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<tbody>
<tr class="odd">
<td></td>
<td colspan="39">OMB Approval #: 2700-0042</td>
</tr>
<tr class="even">
<td></td>
<td colspan="22">amendment of solicitation/</td>
<td colspan="13">1. CONTRACT ID CODE</td>
<td colspan="4">PAGE OF PAGES</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="22">modification of contract amendment of
solicitation/modification of contract</td>
<td colspan="13"></td>
<td colspan="2">1</td>
<td colspan="2">2</td>
</tr>
<tr class="even">
<td></td>
<td colspan="11">2. AMENDMENT/MODIFICATION NO.</td>
<td colspan="8">3. EFFECTIVE DATE</td>
<td colspan="11">4. REQUISITION/PURCHASE REQ. NO.</td>
<td colspan="9">5. PROJECT NO. <em>(If applicable)</em></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="11">273</td>
<td colspan="8">See Block 16c</td>
<td colspan="11"></td>
<td colspan="9"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="7">6. ISSUED BY</td>
<td colspan="4">CODE</td>
<td colspan="8">BH/H36</td>
<td colspan="12">7. ADMINISTERED BY <em>(If other than Item 6)</em></td>
<td colspan="3">CODE</td>
<td colspan="5"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="19"><p>NASA/Johnson Space Center</p>
<p>Attn: BH/Susan L. Stefanovic</p>
<p>2101 NASA Rd. 1</p>
<p>Houston, TX. 77058</p></td>
<td colspan="20"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="39">8. NAME AND ADDRESS OF CONTRACTOR <em>(No., street,
county, State, and Zip Code)</em></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39"><p>Lockheed Martin Space Operations</p>
<p>Attn.: Ms. Mary J. Parry/C79</p>
<p>2400 NASA Rd. 1</p>
<p>P.O. Box 58561</p>
<p>Houston, TX. 77058</p></td>
</tr>
<tr class="even">
<td></td>
<td colspan="5">CODE</td>
<td colspan="14"></td>
<td colspan="5">FACILITY CODE</td>
<td colspan="15"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4">(x)</td>
<td colspan="15">9A. AMENDMENT OF SOLICITATION NO.</td>
<td colspan="20">9B. DATED <em>(SEE ITEM 11)</em></td>
</tr>
<tr class="even">
<td></td>
<td colspan="4"></td>
<td colspan="15"></td>
<td colspan="20"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4"></td>
<td colspan="15">10A. MODIFICATION OF CONTRACT/ORDER NO.</td>
<td colspan="20">10B. DATED <em>(SEE ITEM 13)</em></td>
</tr>
<tr class="even">
<td></td>
<td colspan="4">X</td>
<td colspan="15">NAS 9-19100</td>
<td colspan="20">1-1-94</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF
SOLICITATIONS</td>
</tr>
<tr class="even">
<td colspan="2"></td>
<td></td>
<td colspan="25">The above numbered solicitation is amended as set forth
in Item 14. The hour and date specified for receipt of Offers</td>
<td colspan="2"></td>
<td colspan="6">is extended,</td>
<td></td>
<td colspan="2">is not extended.</td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">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:</td>
</tr>
<tr class="even">
<td></td>
<td colspan="12"></td>
<td colspan="2"></td>
<td colspan="25"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="12">(a) By completing Items 8 and 15, and returning</td>
<td colspan="2"></td>
<td colspan="25">copies of the amendment; (b) By acknowledging receipt
of this amendment on each copy of the offor</td>
</tr>
<tr class="even">
<td></td>
<td colspan="39">submitted; or (c) By separate letter or telegram which
includes a reference to the solicitation and amendment numbers. FAILURE
OF YOUR ACKNOWLEDGEMENT TO</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF
OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION
OF</td>
</tr>
<tr class="even">
<td></td>
<td colspan="39">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</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">or letter makes reference to the solicitation and this
amendment, and is received prior to the opening hour and date
specified.</td>
</tr>
<tr class="even">
<td></td>
<td colspan="39">12. ACCOUNTING AND APPROPRIATION DATA <em>(If
required)</em></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">Net obligation : <strong>2,578,593.45</strong></td>
</tr>
<tr class="even">
<td></td>
<td colspan="39"><p>13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF
CONTRACTS/ORDERS,</p>
<p>IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.(x)
(x)</p></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4">(x)</td>
<td colspan="35">A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify
authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE</td>
</tr>
<tr class="even">
<td></td>
<td colspan="4"></td>
<td colspan="35">CONTRACT ORDER NO. IN ITEM 10A.</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4"></td>
<td colspan="35">B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO
REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying
office,</td>
</tr>
<tr class="even">
<td></td>
<td colspan="4"></td>
<td colspan="35">appropriation date, etc.) SET FORTH IN ITEM 14,
PURSUANT TO THE AUTHORITY OF FAR 43.103(b).</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4"></td>
<td colspan="35">C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT
TO AUTHORITY OF:</td>
</tr>
<tr class="even">
<td></td>
<td colspan="4"></td>
<td colspan="35"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4"></td>
<td colspan="35">d. OTHER <em>(Specify type of modification and
authority)</em></td>
</tr>
<tr class="even">
<td></td>
<td colspan="4">X</td>
<td colspan="35">Limitation of Funding Clause (52.232.22)</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="6"></td>
<td colspan="3"></td>
<td colspan="3"></td>
<td colspan="2"></td>
<td colspan="9"></td>
<td colspan="2"></td>
<td colspan="14"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="8"><strong>E. IMPORTANT:</strong> Contractor</td>
<td colspan="2"></td>
<td colspan="7">is not,</td>
<td></td>
<td colspan="8">is required to sign this document and return</td>
<td colspan="2"></td>
<td colspan="11"><p>copies to the issuing office</p>
<p><strong>IMPORTANT:</strong> Contractor is not, is required to sign
this document and return copies to the issuing office.</p></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="39">14. description of amendment/modification
<em>(Organized by UCF section headings, including solicitation/contract
subject matter where feasible.)</em></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="39">The purpose of this contract modification is to
incrementally fund the contract. In addition, the amount obligated by
Mod 261 is corrected as shown on page 2 to reflect a change in the
amount obligated by PR 4200031637, from $608,411 to $407,784.</td>
</tr>
<tr class="even">
<td></td>
<td colspan="39"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="19">15A. NAME AND TITLE OF SIGNER <em>(Type or
print)</em></td>
<td colspan="20">16A. NAME AND TITLE OF CONTRACTING OFFICER <em>(Type or
print)</em></td>
</tr>
<tr class="even">
<td></td>
<td colspan="19"></td>
<td colspan="20">Susan L. Stefanovic, Contracting Officer</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="15">15B. CONTRACTOR/OFFEROR15B. CONTRACTOR/OFFEROR</td>
<td colspan="4">15C. DATE SIGNED</td>
<td colspan="14">16B. UNITED STATES OF AMERICA</td>
<td colspan="6">16C. DATE SIGNED</td>
</tr>
<tr class="even">
<td></td>
<td colspan="3"></td>
<td colspan="10"></td>
<td colspan="2"></td>
<td colspan="4"></td>
<td colspan="2">BY</td>
<td colspan="11"></td>
<td></td>
<td colspan="6"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="15"><em>(Signature of person authorized to sign)</em></td>
<td colspan="4"></td>
<td colspan="14"><em>(Signature of Contracting Officer)</em></td>
<td colspan="6"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="16"><p>NSN 7540-01-152-8070</p>
<p>PREVIOUS EDITION UNUSABLE</p></td>
<td colspan="4">30-105</td>
<td colspan="19"><p><strong>STANDARD FORM 30</strong> (Rev. 10-83)</p>
<p>Prescribed by GSA</p>
<p>FAR (48 CFR) 53.243</p></td>
</tr>
</tbody>
</table>

Section I, Contract Clauses; I-10 **Limitation of Funds** (FAR
52.232-22) (APR 1984) Paragraph (m) is deleted in its entirety and the
following substituted herein:

> "(m) For purposes of payment of cost, exclusive of fee, the total
> amount allotted by the Government to this contract is **\$
> 1,647,462,219.92**This allotment is for science payload, and
> engineering, test, and analysis services and covers the following
> period of performance**:** May 1, 1993 through **October 20, 2003**.
> An additional amount of \$78,400,000.00 is obligated under this
> contract for payment of fee."
>
> Funding recapitulation:

  ------------------ ------- -------------------- ---------------------------- ---------- -- ------------------------- ----------------------------
                                                  Prior Cumulative                           Modification              Revised Cumulative

                                                  [Through Mod.                              [This                     [Obligation]{.underline}
                                                  261]{.underline}                           Obligation]{.underline}   

                                                                                                                       

                     Total                        \$ **1,644,883,626.47**                    **\$ 2,578,593.45**       **\$ 1,647,462,219.92**
                     Cost                                                                                              

                     Fee                          [\$                                        [\$]{.underline}          [\$
                                                  78,400,000.00]{.underline}                 [0]{.underline}           78,400,000.00]{.underline}

                     Total                        \$ **1,723,283,626.47**                    **\$ 2,578,593.45**       **\$ 1,725,862,219.92**

                                                                                                                       

  **Obligations:**                                                                                                     

                                                                                                                       

  **PR**                     **Amount**                                        **Org**                                 

  4200033172                 \$579,905.00                                      EB72                                    

  4200033312                 \$106,000.00                                      ER72                                    

  4200033849                 \$435,228.00                                      ER72                                    

  4200033933                 \$29,618.00                                       EG72                                    

  4200033828                 \$88,200.00                                       E372                                    

  4200034020                 \$810,748.00                                      EV72                                    

  4200033998                 \$223,919.00                                      ES72                                    

  4200033863                 \$143,528.82                                      SX72                                    

  4200033929                 \$94,000.00                                       MA72                                    

  4200034024                 \$21,299.64                                       EX72                                    

  4200033996                 \$46,146.99                                       E272                                    

                                                                                                                       

  **TOTAL**                  **\$2,578,593.45**                                                                        
  ------------------ ------- -------------------- ---------------------------- ---------- -- ------------------------- ----------------------------