Crosstrack Infrared Sounder CrIS and

1
Cross-track Infrared Sounder (CrIS) and Advanced
Technology Microwave Sounder (ATMS) National
Polar-orbiting Operational Environmental
Satellite System (NPOESS) Hal Bloom
ATMS provides high spatial resolution microwave
data to support temperature and humidity sounding
generation in cloud covered conditions. In
addition, ATMS provides advances in technology
that allow the current operational temperature
and moisture microwave sounder components to be
packaged in one sensor with less total weight,
power, and volume.
CrIS Instrument Characteristics Spectral
Range LWIR Band 650-1095 cm-1 MWIR
Band 1210-1750 cm-1 SWIR Band 2155-2550
cm-1 Spectral Resolution LWIR Band lt0.625cm-1 MWIR
Band lt1.25cm-1 SWIR Band lt2.50cm-1 Registration B
and-to-Band Co-registration lt1.4 FOV Jitter lt50
urad/axis Mapping accuracy lt1.5 km Field-of-View
(FOV) 3X3 FOV Diameter (round) 14 km FOV
shape match lt0.05 Stability Radiometric lt.4LW,
lt.5MW, lt.65SW Spectral ILS lt1 of
FWHM Spectral shift errors lt5 ppm Mass 87
kg Power 91 W Data rate 1.5 mbps Size 70X45X47
The Cross-track Infrared Sounder (CrIS) combined
with the Advanced Technology Microwave Sounder
(ATMS) globally produces atmospheric temperature,
moisture and pressure profiles from space. CrIS
and ATMS (CrIMSS) are the next generation
operational sensor suite selected to fly on the
National Polar-orbiting Operational Environmental
Satellite System (NPOESS) spacecraft. NPOESS
replaces the two current programs -- the National
Oceanic and Atmospheric Administration's (NOAA)
Polar-orbiting Operational Environmental
Satellites (POES) and the Department of Defense's
Defense Meteorological Satellite Program
(DMSP). NPOESS Mission Characteristics Orbit Sun
-synchronous orbit 833 km altitude 98 degree
inclination
Longwave infrared image, averaged over 900-905
cm-1 bandwidth
CrIMSS will operationally produce high vertical
resolution profile measurements of temperature,
water vapor, and pressure. CrIMSS Mission
Products Primary Temperature profiles Moisture
profiles Pressure profiles Calibrated
radiances Secondary Total ozone Sea surface
temperature Cloud top parameters Precipitable
water ERB products In addition to providing
operational temperature, moisture, and pressure
profiles, CrIMSS has the potential to provide
other surface and atmospheric science data,
including total ozone and sea surface temperature.
CrIMSS Temperature EDR Horizontal reporting
interval 48 km at nadir ( up to
0.5mb) Measurement Range 180-335K Vertical
Resolution 1km up to 300mb, 3km 300-30mb
Measur. Uncertainty, clear conditions lt0.98K
up to 30mb Measur. Uncertainty, cloudy
conditions lt2.3K up to 700mb lt1.3
700mb-30mb CrIMSS Moisture EDR Horizontal
reporting interval 48 km at nadir (up to
0.5mb) Measurement Range 0-30g/kg Vertical
Resolution 2km Measur. Uncertainty, clear
conditions lt15 up to 100mb Measur.
Uncertainty, cloudy conditions lt18 up to 100mb

An earlier flight of opportunity for
CrIMSS will be on the NPOESS Preparatory Project
(NPP) 1030 mid morning spacecraft, in late 2005.
The CrIS is designed, developed, and
manufactured by ITT Aerospace.
Clear defined as lt50 cloud covered
  ATMS will eliminate scan coverage gaps
near the equator that exist in the current POES
by adding 3 additional scene pixels on each side
of the scan pattern. (96 vs. 90 Scan positions.)
ATMS is designed, developed and manufactured by
the Aerojet Corporation.
Combining both cross-track infrared and microwave
sensors aboard the NPOESS satellite provides key
Environmental Data Records (EDRs)
Hal Bloom, Integrated Program Office, 8455
Colesville Road, Suite 1450, Silver Spring,
Maryland 20910, 301-427-2084 X103