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Proceedings Paper

End-to-end performance assessment of the National Polar-orbiting Operational Environmental Satellite System environmental data records
Author(s): Vincent Grano; Tanya Scalione; Pamela G. Emch; Hiroshi Agravante; Bruce Hauss; John Jackson; Stephen Mills; Thomas K. Samec; Merit Shoucri
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Paper Abstract

The tri-agency Integrated Program Office (IPO) is managing the development of the National Polar-orbiting Operational Environmental Satellite System (NPOESS). Later this decade, the IPO, through its prime contractor, Northrop Grumman Space Technology (NGST), will launch NPOESS spacecraft into three orbital planes (1330, 1730, and 2130 equatorial ascending nodal crossing times) to provide global coverage with a data refresh rate of approximately four hours. A globally distributed ground system will deliver 95 percent of the data within 26 minutes from the time of on-orbit collection. With the development of NPOESS, we are evolving the existing “weather” satellites into integrated environmental observing systems. To meet user-validated requirements, NPOESS will deliver global data for 55 Environmental Data Records (EDRs). Performance characteristics and attributes have been defined for each of the 55 parameters, including: horizontal/vertical resolution; mapping accuracy; measurement range; measurement precision and uncertainty; refresh rate; data latency; and geographic coverage. Long-term stability requirements have been defined for key parameters to ensure temporal consistency and continuity of data over the operational life of NPOESS. The actual EDR performances will be a result of the sensor and algorithm performances. In order for NPOESS program to determine estimates of EDR performance based on current design data and to assess potential sensor design changes or algorithm modifications, NGST developed an Integrated Weather Products Test Bed (IWPTB). This system can generate simulated radiances from mission/orbit variable, sensor variables, atmospheric and background conditions, and radiative transfer models. These simulated radiances at aperture are used with sensor models and spacecraft factors to generate simulated radiometric temperatures which are processed by science retrieval code to generate EDRs. This paper presents an assessment of the impact of the VIIRS sensor design modification to correct Modulated Instrument Background in the sensor’s optical train. This assessment, which focuses on the Sea Surface Temperature EDR in particular, was generated by the IWPTB end-to-end performance assessment capability.

Paper Details

Date Published: 15 September 2004
PDF: 7 pages
Proc. SPIE 5549, Weather and Environmental Satellites, (15 September 2004); doi: 10.1117/12.561456
Show Author Affiliations
Vincent Grano, NPOESS Integrated Program Office, NOAA (United States)
Tanya Scalione, NPOESS Integrated Program Office, NOAA (United States)
Pamela G. Emch, Northrop Grumman Space Technology (United States)
Hiroshi Agravante, Northrop Grumman Space Technology (United States)
Bruce Hauss, Northrop Grumman Space Technology (United States)
John Jackson, Northrop Grumman Space Technology (United States)
Stephen Mills, Northrop Grumman Space Technology (United States)
Thomas K. Samec, Northrop Grumman Space Technology (United States)
Merit Shoucri, Northrop Grumman Space Technology (United States)


Published in SPIE Proceedings Vol. 5549:
Weather and Environmental Satellites
Thomas H. Vonder Haar; Hung-Lung Allen Huang, Editor(s)

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