<table>
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</colgroup>
<tbody>
<tr class="odd">
<td></td>
<td colspan="41">OMB Approval No. 2700-0042</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="22">amendment of solicitation/</td>
<td colspan="13">1. CONTRACT ID CODE</td>
<td colspan="6">PAGE OF PAGES</td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="22">modification of contract</td>
<td colspan="13">NAS 9-98100</td>
<td colspan="2">1</td>
<td colspan="4">4</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="12">2. AMENDMENT/MODIFICATION NO.</td>
<td colspan="8">3. EFFECTIVE DATE</td>
<td colspan="11">4. REQUISITION/PURCHASE REQ. NO.</td>
<td colspan="10">5. PROJECT NO. <em>(If applicable)</em></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="12">Modification 388</td>
<td colspan="8">See Block 16C Below</td>
<td colspan="11">N/A</td>
<td colspan="10">N/A</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="9">6. ISSUED BY</td>
<td colspan="3">CODE</td>
<td colspan="8"></td>
<td colspan="12">7. ADMINISTERED BY <em>(If other than Item 6)</em></td>
<td colspan="3">CODE</td>
<td colspan="6"></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="20"><p>NASA LYNDON B. JOHNSON SPACE CENTER</p>
<p>Attn: Lawrence A. Kenyon, PCO, Mail Code: BN</p>
<p>2101 NASA Road One</p>
<p>Houston, TX 77058</p></td>
<td colspan="21"><p>NASA Management Office, JPL</p>
<p>Attn: Angel A. Castillo, CO, Mail Stop 180-802J</p>
<p>4800 Oak Grove Drive</p>
<p>Pasadena, CA. 91109</p></td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="41">8. NAME AND ADDRESS OF CONTRACTOR <em>(No., street,
county, State, and ZIP Code)</em></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="41"><p>LOCKHEED MARTIN SPACE OPERATIONS COMPANY</p>
<p>Attn: Timothy Collins, Contracts and Estimating Manager</p>
<p>595 Gemini Avenue</p>
<p>P.O. Box 58980</p>
<p>Houston, TX 77258</p></td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="6">CODE</td>
<td colspan="14"></td>
<td colspan="8">FACILITY CODE</td>
<td colspan="13"></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4">(x)</td>
<td colspan="16">9A. AMENDMENT OF SOLICITATION NO.</td>
<td colspan="21">9B. DATED <em>(SEE ITEM 11)</em></td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="4"></td>
<td colspan="16"></td>
<td colspan="21"></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4"></td>
<td colspan="16">10A. MODIFICATION OF CONTRACT/ORDER NO.</td>
<td colspan="21">10B. DATED <em>(SEE ITEM 13)</em></td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="4">X</td>
<td colspan="16">NAS 9-98100</td>
<td colspan="21">10/01/98</td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="41">11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF
SOLICITATIONS</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="41"></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<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="3"></td>
<td colspan="5">is extended,</td>
<td></td>
<td colspan="7">is not extended.</td>
</tr>
<tr class="even">
<td></td>
<td colspan="41">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>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="13"></td>
<td colspan="4"></td>
<td colspan="22"></td>
<td colspan="4"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="13">(a) By completing Items 8 and 15, and returning</td>
<td colspan="2"></td>
<td colspan="23">copies of the amendment; (b) By acknowledging receipt
of this amendment on each copy of the offor</td>
<td colspan="5"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="41">submitted; or (c) By separate letter or telegram which
includes a reference to the solicitation and amendment numbers. FAILURE
OF YOUR ACKNOWLEDGEMENT TO</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="41">BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF
OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION
OF</td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="41">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>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="41">or letter makes reference to the solicitation and this
amendment, and is received prior to the opening hour and date
specified.</td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="41">12. ACCOUNTING AND APPROPRIATION DATA <em>(If
required)</em></td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="41"></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="41">13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF
CONTRACTS/ORDERS,<br />
IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.(x)</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="5">(x)</td>
<td colspan="36">A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify
authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE</td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="5"></td>
<td colspan="12">CONTRACT ORDER NO. IN ITEM 10A.</td>
<td colspan="24"></td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="5"></td>
<td colspan="36">B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO
REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying
office,</td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="5"></td>
<td colspan="36">appropriation date, etc.) SET FORTH IN ITEM 14,
PURSUANT TO THE AUTHORITY OF FAR 43.103(b).</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="5"></td>
<td colspan="36">C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT
TO AUTHORITY OF:</td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="5">XX</td>
<td colspan="36">FAR 52.243-2, Alt II (Apr 84) Changes – Cost
Reimbursement and Clause H. 4., Government-Provided Equipment</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="5"></td>
<td colspan="36">d. OTHER <em>(Specify type of modification and
authority)</em></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="5"></td>
<td colspan="36"></td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="8"></td>
<td colspan="3"></td>
<td colspan="2"></td>
<td colspan="4"><strong>X</strong></td>
<td colspan="9"></td>
<td colspan="3"></td>
<td colspan="12"></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="7"><strong>E. IMPORTANT:</strong> Contractor</td>
<td colspan="3"></td>
<td colspan="3">is not,</td>
<td colspan="3">X</td>
<td colspan="7">Is required to sign this document and return</td>
<td colspan="2">3</td>
<td colspan="15">copies to the issuing office.</td>
<td colspan="3"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="41"></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="41">14. description of amendment/modification
<em>(Organized by UCF section headings, including solicitation/contract
subject matter where feasible.)</em></td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="41"><h1 id="section"></h1>
<h1
id="i.-the-purpose-of-this-modification-is-to-reflect-the-definitization-of-engineering-change-proposal-ecp-1021-authorizing-the-contractor-to-perform-all-necessary-tasks-associated-with-the-20022003-high-activity-period.-this-modification-is-agreed-to-be-a-complete-and-equitable-adjustment-for-the-contractors-ecp-1021-proposal-dated-july-1-2002-as-well-as-updates-to-it-and-all-work-set-out-in-modification-388.-the-contractor-hereby-releases-the-government-from-any-and-all-liability-under-this-contract-for-further-equitable-adjustment.">I.
The purpose of this modification is to reflect the definitization of
Engineering Change proposal (ECP) 1021 authorizing the contractor to
perform all necessary tasks associated with the 2002/2003 high activity
period. This modification is agreed to be a complete and equitable
adjustment for the contractor’s ECP 1021 proposal dated July 1, 2002, as
well as updates to it, and all work set out in Modification 388. The
contractor hereby releases the Government from any and all liability
under this contract for further equitable adjustment. </h1>
<p>The following revisions are made to this contract.</p></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="41">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.</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="20">15A. NAME AND TITLE OF SIGNER <em>(Type or
print)</em></td>
<td colspan="21">16A. NAME AND TITLE OF CONTRACTING OFFICER <em>(Type or
print)</em></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="20">T. Collins, CSOC Contracts &amp; Estimating
Manager</td>
<td colspan="21">Angel A. Castillo, Contracting Officer</td>
<td colspan="2"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="18">15B. CONTRACTOR/OFFEROR</td>
<td colspan="2">15C. DATE SIGNED</td>
<td colspan="14">16B. UNITED STATES OF AMERICA</td>
<td colspan="7">16C. DATE SIGNED</td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="3"></td>
<td colspan="11"><mark>Barbara George</mark></td>
<td colspan="4"><mark></mark></td>
<td colspan="2"><mark>12/3/2002</mark></td>
<td>BY</td>
<td colspan="12"><mark>Angel Castillo</mark></td>
<td><mark></mark></td>
<td colspan="8"><mark>12/4/2002</mark></td>
<td><mark></mark></td>
</tr>
<tr class="even">
<td></td>
<td colspan="18"><em>(Signature of person authorized to sign)</em></td>
<td colspan="2"></td>
<td colspan="14"><em>(Signature of Contracting Officer)</em></td>
<td colspan="7"></td>
<td colspan="2"></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="19">NSN 7540-01-152-8070<br />
PREVIOUS EDITION UNUSABLE</td>
<td colspan="5">30-105<br />
JSC MS Word (Aug 95)</td>
<td colspan="17"><strong>STANDARD FORM 30</strong> (Rev. 10-83)<br />
Prescribed by GSA<br />
FAR (48 CFR) 53.243</td>
<td colspan="2"></td>
</tr>
</tbody>
</table>

NAS9-98100

Modification 388

Page 2 of 4

II. The amounts in Section B. 1, Estimated Cost and Award Fee are
    changed as follows:

    Estimated Cost\* \$2,970,091

    Estimated LOE Cost no change

    Total Estimated Cost \$2,970,091

    Maximum Available Award Fee\*\* \$ 236,978

    Maximum Available Lookback Fee \$ 59,245

    TOTAL CONTRACT VALUE \$3,266,314

    \* Excluding LOE cost

    \*\* Excluding Lookback Fee

    NAS9-98100

    Modification 388

    Page 3 of 4

    III\. In Section B.2.2.3. Deep Space Network FSA, second paragraph,
    add the following remote facilities:

-   64-meter antenna at Parkes, Australia

-   34-meter antenna at New Norcia, Australia

IV\. Table B.2.2.3-4.0-B, Roles and Responsibilities for the DSN is
hereby modified as follows:

  --------------------- ---------------------- --------------------------
  Function              JPL Responsibility     CSOC Responsibility

  Configuration         Manage Engineering     Operate change management
  Management            Change management      system: maintain CC at the
                        Program (Document      DSN Service Elements.
                        813-7) Approves        Support DSN system updates
                        Configuration Changes  while ensuring
                                               configuration control and
                                               uninterrupted mission
                                               support requirements
                                               through [December 31,
                                               2003.]{.underline}

  Resource Allocation   Manage DSN Resource    Support DSN resource
  and Conflict          Allocation Program     allocation process;
  Resolution            (Document JPL          schedule the network;
                        D-13267). Provide CSOC resolve conflicts that
                        with conflict - free 8 arise in the current
                        -- week planning       schedule. Support two or
                        schedule               more spacecraft with one
                                               antenna through [December
                                               31, 2003.]{.underline}
                                               Support multiple
                                               spacecraft tracking
                                               simultaneously with more
                                               than one antenna and/or
                                               Complex through [December
                                               31, 2003.]{.underline}
                                               Support alternate
                                               configurations and use of
                                               non-DSN assets through
                                               [December 31,
                                               2003.]{.underline} Support
                                               the array of two or more
                                               DSN antennas to increase
                                               the aperture of the DSN
                                               for missions requiring
                                               this capability through
                                               [December 31,
                                               2003.]{.underline}
  --------------------- ---------------------- --------------------------

NAS9-98100

Modification 388

Page 4 of 4

V. The amounts in APPENDIX 3 Schedule A, AWARD FEE DISTRIBUTION are
changed as follows:

+------------------------------------------------+---------------------+
| Evaluation Period                              | Estimated AF        |
|                                                | Earned/Available    |
+------------------------------------------------+---------------------+
|                                                |                     |
+------------------------------------------------+---------------------+
| # BASIC CONTRACT                               |                     |
+------------------------------------------------+---------------------+
| October 1, 1998- June 30, 1999                 | No change           |
+------------------------------------------------+---------------------+
| July 1, 1999 -- December 31, 1999              | No change           |
+------------------------------------------------+---------------------+
| January 1, 2000 -- June 30, 2000               | No change           |
+------------------------------------------------+---------------------+
| July 1, 2000 -- December 31, 2000              | No change           |
+------------------------------------------------+---------------------+
| January 1, 2001 -- June 30, 2001               | No change           |
+------------------------------------------------+---------------------+
| July 1, 2001 -- December 31, 2001              | No change           |
+------------------------------------------------+---------------------+
| January 1, 2002 -- June 30, 2002               | No Change           |
+------------------------------------------------+---------------------+
| July 1, 2002 -- December 31, 2002              | \$78,993            |
+------------------------------------------------+---------------------+
| January 1, 2003 -- June 30, 2003               | \$78,993            |
+------------------------------------------------+---------------------+
| July 1, 2003 -- December 31, 2003              | \$78,992            |
+------------------------------------------------+---------------------+
|                                                |                     |
+------------------------------------------------+---------------------+
| Total AF Earned/Available for Basic            | **\$236,978**       |
+------------------------------------------------+---------------------+
|                                                |                     |
+------------------------------------------------+---------------------+
| "LOOKBACK" PERIOD                              |                     |
+------------------------------------------------+---------------------+
| October 1, 1998 -- December 31, 2000           | No Change           |
+------------------------------------------------+---------------------+
| January 1, 2001 -- December 31, 2003           | \$59,245            |
+------------------------------------------------+---------------------+
| Total Available LF for Basic                   | \$59,245            |
+------------------------------------------------+---------------------+