Abstract
Joint Polar Satellite System (JPSS) -1 is the first of four next-generation, polar-orbiting weather and environmental monitoring satellites currently slated to launch on September 21, 2017. JPSS-1 features technology first tested operationally on the Suomi-National Polar-orbiting Partnership (S-NPP), which is a risk-reduction inter-program mission launched on October 28, 2011. In addition to the spacecraft, this technology includes five instruments: the Advanced Technology Microwave Sounder (ATMS), the Cross-track Infrared Sounder (CrIS), the Visible Infrared Imaging Radiometer Suite (VIIRS), the Ozone Mapping and Profiler Suite (OMPS), and the Clouds and the Earth’s Radiant Energy System (CERES). The two will share identical orbit dynamics including a nominal altitude of 824 +/- 17 km, a ground track repeat accuracy of +/- 20 km at the Equator, a ground track repeat cycle of 16 days, and a local time ascending node (LTAN) of 1330 +/- 10 minutes. The two satellites will be separated by half an orbit (~50 minutes) during nominal operations. JPSS-1 will provide critical, near-real time data inputs to National Weather Service (NWS) models, improve forecasting in the Alaskan region, and extend the 30+ year continuous history of climate data records collected by remote sensing satellite technology. The purpose of this presentation is to highlight the capability enhancements, changes, and limitations of JPSS-1 compared to S-NPP.
Enhancements include the addition of a Ka band transmitter, twice per orbit ground station data links, new ATMS scan drive bearings, VIIRS DNB stray light, and improved OMPS Nadir Profiler (NP)/Total Column (TC) resolution. Changes include the incorporation of all data into the HRD data stream, ATMS SDR data reported in radiance versus brightness temperature, CrIS full spectral resolution and VIIRS M11 at night in the at-launch product baseline, reduction in VIIRS scan sync loss susceptibility, and no OMPS Limb instrument. Limitations include the lack of ATMS flight configuration spectral response functions (SRFs) taken after ATMS rework, VIIRS scan-to-scan underlap in the equatorial region, and increased VIIRS polarization in the ocean color bands.
Capability Enhancements, Changes, and Limitations of Joint Polar Satellite System (JPSS)-1 Compared to Suomi-National Polar-Orbiting Partnership (S-NPP)
Joint Polar Satellite System (JPSS) -1 is the first of four next-generation, polar-orbiting weather and environmental monitoring satellites currently slated to launch on September 21, 2017. JPSS-1 features technology first tested operationally on the Suomi-National Polar-orbiting Partnership (S-NPP), which is a risk-reduction inter-program mission launched on October 28, 2011. In addition to the spacecraft, this technology includes five instruments: the Advanced Technology Microwave Sounder (ATMS), the Cross-track Infrared Sounder (CrIS), the Visible Infrared Imaging Radiometer Suite (VIIRS), the Ozone Mapping and Profiler Suite (OMPS), and the Clouds and the Earth’s Radiant Energy System (CERES). The two will share identical orbit dynamics including a nominal altitude of 824 +/- 17 km, a ground track repeat accuracy of +/- 20 km at the Equator, a ground track repeat cycle of 16 days, and a local time ascending node (LTAN) of 1330 +/- 10 minutes. The two satellites will be separated by half an orbit (~50 minutes) during nominal operations. JPSS-1 will provide critical, near-real time data inputs to National Weather Service (NWS) models, improve forecasting in the Alaskan region, and extend the 30+ year continuous history of climate data records collected by remote sensing satellite technology. The purpose of this presentation is to highlight the capability enhancements, changes, and limitations of JPSS-1 compared to S-NPP.
Enhancements include the addition of a Ka band transmitter, twice per orbit ground station data links, new ATMS scan drive bearings, VIIRS DNB stray light, and improved OMPS Nadir Profiler (NP)/Total Column (TC) resolution. Changes include the incorporation of all data into the HRD data stream, ATMS SDR data reported in radiance versus brightness temperature, CrIS full spectral resolution and VIIRS M11 at night in the at-launch product baseline, reduction in VIIRS scan sync loss susceptibility, and no OMPS Limb instrument. Limitations include the lack of ATMS flight configuration spectral response functions (SRFs) taken after ATMS rework, VIIRS scan-to-scan underlap in the equatorial region, and increased VIIRS polarization in the ocean color bands.