Polar-Orbiting Environmental Satellites: With Costs Increasing and Data Continuity at Risk, Improvements Needed in Tri-agency Decision Making Page: 4 of 52
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Table 1: Expected NPOESS Instruments as of August 31, 2004 8
Table 2: Major Changes to the NPOESS Program by the Nunn-
McCurdy Certification Decision 11
Table 3: Changes to NPOESS Instruments, as of June 2006 12
Table 4: Configuration of Instruments Planned for NPP and
NPOESS Satellites, as of May 2008 14
Table 5: Status and Risk Level of Key Space and Ground
Components, as of April 2009 16
Table 6: Changes in Key Program Milestones over Time 19
Figure 1: Configuration of Operational Polar Satellites 4
Figure 2: Stages of Satellite Data Processing 5
Figure 3: Examples of Weather Products 5
Figure 4: NPOESS Program Roles and Responsibilities 7
Figure 5: Nunn-McCurdy Certified Satellite Constellation 12
Figure 6: Potential Gaps in the Continuity of Current and Planned
Polar Satellites 20
GAO-09-564 Polar-orbiting Environmental Satellites
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United States. Government Accountability Office. Polar-Orbiting Environmental Satellites: With Costs Increasing and Data Continuity at Risk, Improvements Needed in Tri-agency Decision Making, report, June 17, 2009; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc302059/m1/4/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.