------------------------ ---------------- ----------- --------- ---------------------- ------------ ------------------- ---------------------
                                                                                                                          

  **OMB Approval No.                                                                                                      
  2700-0042**                                                                                                             

  **AMENDMENT OF                                                   1. CONTRACT ID CODE\               PAGE OF PAGES\      
  SOLICITATION/\                                                          NAS9-98100                  1 \| 6              
  MODIFICATION OF                                                                                                         
  CONTRACT**                                                                                                              

   2.                                        3.                    4.                                  5. PROJECT NO.*(if 
  AMENDMENT/MODIFICATION                    EFFECTIVE             REQUISITION/PURCHASE                applicable)*        
  NO.                                       DATE                  REQ. NO.                                                

   Modification 393                          See Block             02284TA1-E                                             
                                            16C                                                                           

   6. ISSUED BY            CODE                                    7. ADMINISTERED BY                 CODE                 
                                                                  *(if other than item                                    
                                                                  6)*                                                     

  NASA Lyndon B. Johnson                                                                                                  
  Space Center\                                                                                                           
  Attn: Lawrence A.                                                                                                       
  Kenyon, PCO, Mail Code                                                                                                  
  BN\                                                                                                                     
  2101 Nasa Road One\                                                                                                     
  Houston, Texas 77058                                                                                                    

   8. NAME AND ADDRESS OF                                                                                                 
  CONTRACTOR *(No.,                                                                                                       
  Street, County, State,                                                                                                  
  and ZIP Code)*                                                                                                          

  Lockheed Martin Space                                                                                                   
  Operations Company\                                                                                                     
  Attn: Tim Collins,                                                                                                      
  Manager of Contracts\                                                                                                   
  595 Gemini Avenue\                                                                                                      
  Houston, Texas 77058                                                                                                    

    CODE                                                           FACILITY CODE                                          

  \(X\)                     9A. AMENDMENT                          9B. DATED *(SEE ITEM                                   
                           OF SOLICITATION                        11)*                                                    
                           NO.                                                                                            

   \                        \                                      \                                                      
                                                                                                                          

                            10A.                                   10B. DATED *(SEE ITEM                                  
                           MODIFICATION OF                        13)*                                                    
                           CONTRACT/ORDER                                                                                 
                           NO.                                                                                            

  X                           NAS9-98100                             10/1/98                                              

  11\. THIS ITEM ONLY                                                                                                     
  APPLIES TO AMENDMENTS OF                                                                                                
  SOLICITATIONS                                                                                                           

    The above numbered                                                                                                    
  solicitation is amended                                                                                                 
  as set forth in Item 14.                                                                                                
  The hour and date                                                                                                       
  specified for receipt of                                                                                                
  Offers  is  is not                                                                                                      
  extended.                                                                                                               

  Offers must acknowledge                                                                                                 
  receipt of this                                                                                                         
  amendment prior to the                                                                                                  
  hour and date specified                                                                                                 
  in the solicitation or                                                                                                  
  as amended, by one of                                                                                                   
  the following methods:                                                                                                  

  \(a\) By completing                                                                                                     
  Items 8 and 15, and                                                                                                     
  returning  copies of the                                                                                                
  amendment; (b) By                                                                                                       
  acknowledging receipt of                                                                                                
  this amendment on each                                                                                                  
  copy of the offer                                                                                                       

  submitted; or (c) By                                                                                                    
  separate letter or                                                                                                      
  telegram which includes                                                                                                 
  a reference to the                                                                                                      
  solicitation and                                                                                                        
  amendment numbers.                                                                                                      
  FAILURE OF YOUR                                                                                                         
  ACKNOWLEDGEMENT TO                                                                                                      

  BE RECIEVED AT THE PLACE                                                                                                
  DESIGNATED FOR THE                                                                                                      
  RECEIPT OF OFFERS PRIOR                                                                                                 
  TO THE HOUR AND DATE                                                                                                    
  SPECIFIED MAY RESULT IN                                                                                                 
  REJECTION OF                                                                                                            

  YOUR OFFER. If by virtue                                                                                                
  of this amendment you                                                                                                   
  desire to change an                                                                                                     
  offer already submitted,                                                                                                
  such change may be made                                                                                                 
  by telegram or letter,                                                                                                  
  provided each telegram                                                                                                  

  or letter makes                                                                                                         
  reference to the                                                                                                        
  solicitation and this                                                                                                   
  amendment, and is                                                                                                       
  received prior to the                                                                                                   
  opening hour and date                                                                                                   
  specified.                                                                                                              

   12. ACCOUNTING and                                                                                                     
  APPROPRIATION DATA *(if                                                                                                 
  required)*                                                                                                              

   See page 3.                                                                           Increase:      \$27,948,384.00   

  13\. THIS ITEM APPLIES                                                                                                  
  ONLY TO MODIFICATION OF                                                                                                 
  CONTRACTS/ORDERS.\                                                                                                      
  IT MODIFIES THE                                                                                                         
  CONTRACT/ORDER NO. AS                                                                                                   
  DESCRIBED IN ITEM 14.(x)                                                                                                

   (X)                      A. THIS CHANGE                                                                                
                           ORDER IS ISSUED                                                                                
                           PURSUANT TO:                                                                                   
                           (Specify                                                                                       
                           authority) THE                                                                                 
                           CHANGES SET                                                                                    
                           FORTH IN ITEM 14                                                                               
                           ARE MADE IN THE\                                                                               
                            CONTRACT ORDER                                                                                
                           NO. IN ITEM                                                                                    
                           10A.\                                                                                          
                                                                                                                          

                            B. THE ABOVE                                                                                  
                           NUMBERED                                                                                       
                           CONTRACT/ORDER                                                                                 
                           IS MODIFIED TO                                                                                 
                           REFLECT THE                                                                                    
                           ADMINISTRATIVE                                                                                 
                           CHANGES (such as                                                                               
                           changes in                                                                                     
                           paying office,\                                                                                
                            appropriation                                                                                 
                           date, etc.) SET                                                                                
                           FORTH IN ITEM                                                                                  
                           14, PURSUANT TO                                                                                
                           THE AUTHORITY OF                                                                               
                           FAR 43.103(b).\                                                                                
                                                                                                                          

                            C. THIS                                                                                       
                           SUPPLEMENTAL                                                                                   
                           AGREEMENT IS                                                                                   
                           ENTERED INTO                                                                                   
                           PURSUANT TO THE                                                                                
                           AUTHORITY OF:\                                                                                 
                            \                                                                                             
                                                                                                                          

   X                        D. OTHER                                                                                      
                           *(Specify type                                                                                 
                           of modification                                                                                
                           and authority)*\                                                                               
                            Pursuant to FAR                                                                               
                           52.232-22,                                                                                     
                           Limitation of                                                                                  
                           Funds (April                                                                                   
                           1984)\                                                                                         
                                                                                                                          

   E. **IMPORTANT:**                                                                                                      
  Contractor  is not  is                                                                                                  
  required to sign this                                                                                                   
  document and return                                                                                                     
  \_\_\_\_\_\_\_\_\_\_                                                                                                    
  copies to the issuing                                                                                                   
  office.                                                                                                                 

   14. Description of                                                                                                     
  amendment/modification                                                                                                  
  *(Organized by UCF                                                                                                      
  section headings,                                                                                                       
  including                                                                                                               
  solicitation/contract                                                                                                   
  subject matter where                                                                                                    
  feasible.)*                                                                                                             

   \                                                                                                                      
     See page 2.\                                                                                                         
   \                                                                                                                      
                                                                                                                          

   Except as provided                                                                                                     
  herein, all terms and                                                                                                   
  conditions of the                                                                                                       
  document referenced in                                                                                                  
  Item 9A or 10A, as                                                                                                      
  heretofore changed,                                                                                                     
  remains unchanged and in                                                                                                
  full force and effect.                                                                                                  

   15A. NAME AND TITLE OF                                          16A. NAME AND TITLE                                    
  SIGNER *(Type or print)*                                        OF CONTRACTING OFFICER                                  
                                                                  *(Type or print)*                                       

                                                                   Caroline Marrs Root,                                   
                                                                  Contracting Officer                                     

   15B. CONTRACTOR/OFFEROR                               15C.      16B. UNITED STATES OF                                   16C. DATE SIGNED
                                                        DATE      AMERICA                                                 
                                                        SIGNED                                                            

                                                                  BY [Caroline                                            [12/17/2002]{.mark}
                                                                  Root]{.mark}                                            

  *(Signature of person                                           *(Signature of                                           
  authorized to sign)*                                            Contracting Officer)*                                   

  NSN 7540-01-152-888070\                               30-105\                          STANDARD                         
  PREVIOUS EDITION                                      JSC SPICE                        FORM 30                          
  UNUSABLE\                                             (June                            (Rev.                            
                                                        2002)\                           10-83)\                          
                                                                                         Prescribed                       
                                                                                         by GSA\                          
                                                                                         FAR (48 CFR)                     
                                                                                         53.243                           
  ------------------------ ---------------- ----------- --------- ---------------------- ------------ ------------------- ---------------------

I. The purpose of this Modification 393 is to add incremental funding to
this contract. Clause B.2, CONTRACT FUNDING, is deleted in its entirety
and replaced with the following:

B.2 CONTRACT FUNDING (NASA 1852.232-81) (JUN 1990)

\(a\) For the purpose of cost, exclusive of fee, in accordance with the
Limitation of Funds clause, the total amount allotted by the Government
to this contract for all efforts is \$1,550,951,483.72. This allotment
is for all CSOC efforts and covers the following estimated period of
performance October 31, 1998 to January 10, 2003.

\(b\) An additional amount of \$155,931,478.48 is obligated under this
contract for all efforts for payment of fee.

(End of Clause)

Funding Recapitulation:

  ----------------- -------------------- ----------------- --------------------
                    Prior Balance        Modification 393  New Balance

  Cost              \$1,525,543,861.72   \$25,407,622.00   \$1,550,951,483.72

  Fee               \$153,390,716.48     \$2,540,762.00    \$155,931,478.48

  Total             \$1,678,934,578.20   \$27,948,384.00   \$1,706,882,962.20
  ----------------- -------------------- ----------------- --------------------

**[Commitments (Amounts of PR)]{.underline}**

  ------ ---- ---- ------ ------ ----- ---- ---- -------- ------ -------------- ----------------- -- ---------------------
                                                                                                     

         FC   RO   OCC    PO     AIN   MA   PY   FS              PWC            Amount               

                                                                                                     

                                                                                                     

  1\.    5A   TA   2540   TA11   72    51   03   29              227-72-04-00   \$37,022.00          

                                                                                                     

  2\.    5A   TA   2540   TA11   72    00   03   54              321-20-00-00   \$450,000.00         

                                                                                                     

  3\.    5A   TA   2540   TA11   72    00   03   54              322-50-10-SD   \$30,000.00          

                                                                                                     

  4\.    5A   TA   2540   TA11   72    00   03   54              329-10-PR-GM   \$200,000.00         

                                                                                                     

  5\.    5A   TA   2540   TA11   72    00   03   54              264-02-00-76   \$700,000.00         

                                                                                                     

  6\.    5A   TA   2540   TA11   72    00   03   54              264-51-01-00   \$100,000.00         

                                                                                                     

  7\.    5A   TA   2540   TA11   72    00   03   54              283-10-00-76   \$120,000.00         

                                                                                                     

  8\.    5A   TA   2540   TA11   72    00   03   52              337-41-18-62   \$75,000.00          

                                                                                                     

  9\.    5A   TA   2540   TA11   72    00   03   52              337-41-18-SD   \$300,000.00         

                                                                                                     

  10\.   5A   TA   2540   TA11   72    00   03   52              337-43-02-IM   \$1,000,000.00       

                                                                                                     

  11\.   5A   TA   2540   TA11   72    00   03   52              337-43-02-IS   \$100,000.00         

                                                                                                     

  12\.   5A   TA   2540   TA11   72    00   03   52              337-43-02-IV   \$100,000.00         

                                                                                                     

  13\.   5A   TA   2540   TA11   72    00   03   52              337-43-03-MM   \$2,500,000.00       

                                                                                                     

  14\.   5A   TA   2540   TA11   72    00   03   52              337-43-03-MS   \$50,000.00          

                                                                                                     

  15\.   5A   TA   2540   TA11   72    00   03   52              337-43-03-MV   \$275,000.00         

                                                                                                     

  16\.   5A   TA   2540   TA11   72    00   03   54              374-10-10-76   \$2,200,000.00       

                                                                                                     

  17\.   5A   TA   2540   TA11   72    00   03   54              375-10-10-51   \$400,000.00         

                                                                                                     

  18\.   5A   TA   2540   TA11   72    00   03   54              375-10-10-IM   \$1,000,000.00       

                                                                                                     

  19\.   5A   TA   2540   TA11   72    00   03   54              375-10-10-IV   \$75,000.00          

                                                                                                     

  20\.   5A   TA   2540   TA11   72    00   03   54              375-10-10-IS   \$25,000.00          

                                                                                                     

  21\.   5A   TA   2540   TA11   72    00   03   54              375-10-10-MM   \$4,200,000.00       

                                                                                                     

  22\.   5A   TA   2540   TA11   72    00   03   54              375-10-10-MS   \$60,000.00          

                                                                                                     

  23\.   5A   TA   2540   TA11   72    00   03   54              37510-10-SD    \$40,000.00          

                                                                                                     

  24\.   5A   TA   2540   TA11   72    00   03   54              377-10-10-00   \$200,000.00         

                                                                                                     

  25\.   5A   TA   2540   TA11   72    00   03   54              377-10-10-MA   \$250,000.00         

                                                                                                     

  26\.   5A   TA   2540   TA11   72    00   03   54              377-10-10-SI   \$50,000.00          

                                                                                                     

  27\.   5A   TA   2540   TA11   72    00   03   54              329-20-10-SD   \$200,000.00         

                                                                                                     

  28\.   5A   TA   2540   TA11   72    00   03   29              469-10-00-00   \$62,000.00          

                                                                                                     

  29\.   5A   TA   2540   TA11   72    00   03   29              469-20-00-00   \$55,000.00          

                                                                                                     

  30\.   5A   TA   2540   TA11   72    00   03   29              469-90-00-00   \$98,667.00          

                                                                                                     

  31\.   5A   TA   2540   TA11   72    00   03   29              470-24-00-00   \$30,000.00          

                                                                                                     

  32\.   5A   TA   2540   TA11   72    00   03   29              470-25-00-00   \$49,000.00          

                                                                                                     

  33\.   5A   TA   2540   TA11   72    00   03   29              729-21-10-01   \$30,000.00          

                                                                                                     

  34\.   5A   TA   2540   TA11   72    00   03   29              729-22-10-01   \$30,000.00          

                                                                                                     

  35\.   5A   TA   2540   TA11   72    00   03   29              729-90-00-00   \$150,000.00         

                                                                                                     

  36\.   5A   TA   2540   TA11   72    00   03   29              729-91-00-00   \$770,000.00         

                                                                                                     

  37\.   5A   TA   2540   TA11   72    00   03   29              759-10-00-00   \$302,000.00         

                                                                                                     

  38\.   5A   TA   2540   TA11   72    00   03   29              860-10-00-00   \$9,227.00           

                                                                                                     

  39\.   5A   TA   2540   TA11   72    21   02   29              344-50-92-00   \$13,470.00          

                                                                                                     

  40\.   5A   TA   2540   TA11   72    51   02   29              229-04-11-00   \$9,775.00           

                                                                                                     

  41\.   5A   TA   2540   TA11   72    51   02   29              291-04-24-00   \$13,125.00          

                                                                                                     

  42\.   5A   TA   2540   TA11   72    51   02   29              292-03-77-00   \$2,000.00           

                                                                                                     

  43\.   5A   TA   2540   TA11   72    51   02   29              428-50-17-00   \$4,000.00           

                                                                                                     

  44\.   5A   TA   2540   TA11   72    00   03   54              329-50-00-00   \$4,400,000.00       

                                                                                                     

  45\.   5A   TA   2540   TA11   72    51   03   29              470-05-10-01   \$250,000.00         

                                                                                                     

  46\.   5A   TA   2540   TA11   72    51   03   29              470-07-10-01   \$50,000.00          

                                                                                                     

  47\.   5A   TA   2540   TA11   72    51   03   29              470-11-10-01   \$150,000.00         

                                                                                                     

  48\.   5A   TA   2540   TA11   72    51   03   29              470-28-10-01   \$10,000.00          

                                                                                                     

  49\.   5A   TA   2540   TA11   72    51   02   29              470-90-10-01   \$500,000.00         

                                                                                                     

  50\.   5A   TA   2540   TA11   72    51   03   29              470-90-10-01   \$2,000,000.00       

                                                                                                     

  51\.   5A   TA   2540   TA11   72    51   03   29              665-14-04-00   \$250,000.00         

                                                                                                     

  52\.   5A   TA   2540   TA11   72    51   03   29              665-15-02-00   \$33,000.00          

                                                                                                     

  53\.   5A   TA   2540   TA11   72    51   03   29              665-15-21-00   \$377,000.00         

                                                                                                     

  54\.   5A   TA   2540   TA11   72    51   03   29              675-71-60-01   \$20,000.00          

                                                                                                     

  55\.   5A   TA   2540   TA11   72    51   03   29              675-71-60-02   \$10,000.00          

                                                                                                     

  56\.   5A   TA   2540   TA11   72    51   03   29              675-72-10-01   \$238,000.00         

                                                                                                     

  57\.   5A   TA   2540   TA11   72    51   03   29              675-72-20-01   \$583,000.00         

                                                                                                     

  58\.   5A   TA   2540   TA11   72    51   03   29              675-72-40-01   \$340,000.00         

                                                                                                     

  59\.   5A   TA   2540   TA11   72    51   03   29              675-72-50-01   \$18,031.00          

                                                                                                     

  60\.   5A   TA   2540   TA11   72    51   03   29              675-72-50-02   \$212,000.00         

                                                                                                     

  61\.   5A   TA   2540   TA11   72    51   03   29              675-72-60-01   \$25,000.00          

                                                                                                     

  62\.   5A   TA   2540   TA11   72    51   03   29              675-72-70-01   \$474,574.00         

                                                                                                     

  63\.   5A   TA   2540   TA11   72    51   03   29              675-72-80-01   \$71,000.00          

                                                                                                     

  64\.   5A   TA   2540   TA11   72    51   03   29              675-72-80-02   \$156,000.00         

                                                                                                     

  65\.   5A   TA   2540   TA11   72    51   03   29              675-73-10-01   \$75,000.00          

                                                                                                     

  66\.   5A   TA   2540   TA11   72    51   03   29              675-73-20-01   \$75,000.00          

                                                                                                     

  67\.   5A   TA   2540   TA11   72    51   03   29              675-73-30-01   \$78,000.00          

                                                                                                     

  68\.   5A   TA   2540   TA11   72    51   03   29              675-73-40-01   \$322,000.00         

                                                                                                     

  69\.   5A   TA   2540   TA11   72    51   03   29              675-73-50-01   \$380,000.00         

                                                                                                     

  70\.   5A   TA   2540   TA11   72    51   03   29              675-74-10-01   \$322,395.00         

                                                                                                     

  71\.   5A   TA   2540   TA11   72    51   02   29              622-94-05-00   \$4,000.00           

                                                                                                     

  72\.   5A   TA   2540   TA11   72    00   02   54              320-10-20-01   \$300.00             

                                                                                                     

  73\.   5A   TA   2540   TA11   72    51   02   29              621-30-04-00   \$16,000.00          

                                                                                                     

  74\.   5A   TA   2540   TA11   72    51   02   29              622-33-48-00   \$8,000.00           

                                                                                                     

  75\.   5A   TA   2540   TA11   72    51   02   29              622-24-28-00   \$3,100.00           

                                                                                                     

  76\.   5A   TA   2540   TA11   72    51   02   29              656-75-01-00   \$4,000.00           

                                                                                                     

  77\.   5A   TA   2540   TA11   72    51   02   29              806-50-01-00   \$127,698.00         

                                                                                                     

                                                                                                     

                                                 Total                          \$27,948,384.00      
                                                 Amount                                              
                                                 of PR:                                              

                                                                                                     
  ------ ---- ---- ------ ------ ----- ---- ---- -------- ------ -------------- ----------------- -- ---------------------