Introduction

The New Millennium Program Earth Observing-1 (EO-1) program completed its baseline mission requirements successfully after one year of operations on November 20, 2001. In December 2001, NASA Headquarters approved a plan to permit the EO-1 Program to embark on an Extended Mission operations phase. The objectives of the Extended Mission are to maximize the infusion of EO-1 technology by simultaneously increasing utilization of the on-orbit resource and to reduce the cost of operations through a Continuous Improvement Program that is further described in Part 8 of the Validation Report.

To accomplish this objective, a collaborative partnership between NASA and the U.S. Geological Survey (USGS) was forged to take advantage of the inherent strengths of each agency. The partnership began officially in January 2002 via an Implementation Agreement (IA).

During the latter part of the Extended Mission period, there were activities to define the expected remaining lifetimes of EO-1 critical components, to refine the December 1999 Orbital Debris Assessment Report, and based on the date of reentry start, to compute the time period for reentry.  In addition, two highly significant presentations were made at NASA Headquarters on maintaining mission continuity beyond fiscal year 2005 and to solicit additional funds from the National Reconnaissance Office (NRO) and the National Geospatial-Intelligence Agency (NGA).

Documentation of these activities and presentations follow:

1. EO-1 Mission Continuity FY05 and Beyond (Oct. 4, 2004) PPT
2. EO-1 NRO/NGA Presentation (Jan. 13, 2005) PPT
3. Reentry Variance Memorandum MS Word
4. Reentry Parameter Table – JSC MS Word
5. Reentry Lifetime Graph JPG
6. Life Limiting Components Table MS Word
7. Total Ionizing Dose Environment for the EO-1 Spacecraft MS Word
8. Refinement of Orbital Debris Assessment Report MS Word