WMO OSCAR | Satellite: SNPP

Satellite: SNPP

Satellite details

Acronym	SNPP
Full name	Suomi National Polar-orbiting Partnership
Satellite Description	Prototype of the JPSS programme, originally designed as Preparatory Programme of the aborted NPOESS (National Polar-orbiting Operational Environmental Satellite System). Main mission: operational meteorology. Substantial contribution to atmospheric chemistry and climatology.
Mass at launch	2128 kg	Dry mass	1400 kg
Power	2285 W
Data access link	https://www.bou.class.noaa.gov/saa/products/welcome
Data access information	Real-time availability of ATMS, CERES, CrIS, OMPS and VIIRS by HRD. Selected NRT data for NWP available from the NUCAPS system, http://www.ospo.noaa.gov/Products/atmosphere/soundings/nucaps/index.html Offline data are available from CLASS.
Orbit	Sunsynchronous orbit	Altitude	833 km
ECT	13:25 asc

Space agency	NOAA , NASA
Status	Operational
Details on Status (as available)	Secondary PM satellite. No data from 26/7/22 to 12/8/22 due to spacecraft anomaly
Launch	28 Oct 2011	EOL	≥2023
Last update:	2022-08-11

Associated satellite programme and related satellites

Note: red tag: no longer operational , green tag: operational , blue tag : future

Joint Polar Satellite System
- JPSS-2 (2022-11 - 2029)
- JPSS-3 (2027 - 2034)
- JPSS-4 (2032 - 2039)
- NOAA-20 (2017 - 2024)
- SNPP (2011 - 2023)

Satellite Payload

All known Instruments flying on SNPP

Acronym	Full name
ATMS	Advanced Technology Microwave Sounder
CERES	Clouds and the Earth’s Radiant Energy System
CrIS	Cross-track Infrared Sounder
OMPS-limb	Ozone Mapping and Profiler Suite
OMPS-nadir	Ozone Mapping and Profiler Suite
VIIRS	Visible/Infrared Imager Radiometer Suite

Satellite payload

All known instruments flying on SNPP

Instrument	Full name	Start date	EOL date	Status	NRT data	Instrument landing page	Comments
ATMS	Advanced Technology Microwave Sounder	06 Jan 2012	≥2023 *	Active	Yes	www.ospo.noaa.gov
CERES	Clouds and the Earth’s Radiant Energy System	06 Jan 2012	≥2023 *	Active	Yes	www.ospo.noaa.gov
CrIS	Cross-track Infrared Sounder	06 Jan 2012	≥2023 *	Degraded	Yes	www.ospo.noaa.gov	Moved to Full Spectral Resolution with 2211 channels in the course of 2nd half of 2016. Mid-Wave digital signal processor inactive on side-1 and 2 since 13 July 2021.
OMPS-limb	Ozone Mapping and Profiler Suite	06 Jan 2012	≥2023 *	Active	Yes	www.ospo.noaa.gov
OMPS-nadir	Ozone Mapping and Profiler Suite	06 Jan 2012	≥2023 *	Active	Yes	www.ospo.noaa.gov
VIIRS	Visible/Infrared Imager Radiometer Suite	06 Jan 2012	≥2023 *	Active	Yes	www.ospo.noaa.gov

* The information in this field is estimated or assumed

Satellite frequencies for Earth Observation, data transfer and platform communications and control

Frequencies for satellite management

Service	Direction	Frequency (MHz)	Emission designator	Bandwidth (kHz)	Polarisation	D/A	Data rate (kbps) or Baseband (kHz)	Comments
TDRSS	S-S	2067.27 MHz	6M04G7DDC	6000 kHz	RHCP	D		Trasmission to TDRSS
TDRSS	S-S	2247.5 MHz	6M04G7D	6040 kHz	RHCP	D	32.8 kbps	Return from TDRSS
Command	E-S	2067.3 MHz	4K00G7D	4 kHz	RHCP	D	2 kbps	Commands
Command	E-S	2067.3 MHz	256KG7D	256 kHz	RHCP	D	128 kbps	Commands (memory load)
TT & C	S-E	2247.5 MHz	6M04G7D	6040 kHz	RHCP	D	1049 kbps	Telemetry and commands
GPS	S-S	1227.6 MHz	24M0G1D	24000 kHz	RHCP	D	0.05 kbps	GPS reception at SNPP
GPS	S-S	1575.42 MHz	24M0G1D	24000 kHz	RHCP	D	0.05 kbps	GPS reception at SNPP

Earth observation MW frequencies

Service	Sensing mode	Frequency (GHz)	Bandwidth (MHz)	Polarisation	Comments
ATMS	passive	23.8 GHz	270 MHz	QV	Water vapour channel
ATMS	passive	31.4 GHz	180 MHz	QV	Window channel
ATMS	passive	50 GHz - 57.66 GHz	0 MHz	QH	Oxygen band, 13 channels
ATMS	passive	89.5 GHz	5000 MHz	QV	Window channel
ATMS	passive	165.5 GHz	3000 MHz	QH	Weak water vapour channel
ATMS	passive	175 GHz - 191.31 GHz	0 MHz	QH	Water vapour band, 5 channels

Frequencies for scientific data acquisition and communication services at ground stations

Service	Direction	Frequency (MHz)	Bandwidth (kHz)	Polarisation	D/A	Data rate (kbps) or Baseband (kHz)	Comments
SMD	S-E	8212.5 MHz	300000 kHz	RHCP	D	262000 kbps	Stored Mission Data
HRD	S-E	7812 MHz	30000 kHz	RHCP	D	13000 kbps	Real-time High Rate Data