Suomi NPP

Suomi NPP
	Suomi NPP satellite
Names	Suomi National Polar-orbiting Partnership; NPOESS Preparatory Project (NPP)
Mission type	Weather
Operator	NASA / NOAA / DoD
COSPAR ID	2011-061A
SATCAT no.	37849
Website	[1]
Mission duration	5 years (planned); 12 years, 8 months, 9 days (elapsed)
Spacecraft properties
Bus	BCP-2000
Manufacturer	Ball Aerospace & Technologies
Launch mass	2,128 kg (4,691 lb)
Dry mass	1,400 kg (3,100 lb)
Payload mass	464 kg (1,023 lb)
Dimensions	1.3 m x 1.3 m x 4.2 m
Power	2000 watts
Start of mission
Launch date	28 October 2011,; 09:48:01.828 UTC
Rocket	Delta II 7920-10C; (Delta D357)
Launch site	Vandenberg, SLC-2W
Contractor	United Launch Alliance
Orbital parameters
Reference system	Geocentric orbit
Regime	Sun-synchronous orbit
Perigee altitude	833.7 km (518.0 mi)
Apogee altitude	834.3 km (518.4 mi)
Inclination	98.79°
Period	101.44 minutes
CERES
Instruments
CERES	Clouds and the Earth's Radiant Energy System
CrIS	Cross-track Infrared Sounder
OMPS	Ozone Mapping and Profiler Suite
ATMS	Advanced Technology Microwave Sounder
VIIRS	Visible Infrared Imaging Radiometer Suite
	; Insignia for the NPOESS Preparatory Project NPOESS Preparatory Project ← NOAA-19 NOAA-20 →

The Suomi National Polar-orbiting Partnership (Suomi NPP), previously known as the National Polar-orbiting Operational Environmental Satellite System Preparatory Project (NPP) and NPP-Bridge, is a weather satellite operated by the United States National Oceanic and Atmospheric Administration (NOAA). It was launched in 2011 and is currently in operation.

Suomi NPP was originally intended as a pathfinder for the National Polar-orbiting Operational Environmental Satellite System (NPOESS) program, which was to have replaced NOAA's Polar Operational Environmental Satellites (POES) and the U.S. Air Force's Defense Meteorological Satellite Program (DMSP). Suomi NPP was launched in 2011 after the cancellation of NPOESS to serve as a stop-gap between the POES satellites and the Joint Polar Satellite System (JPSS) which will replace them. Its instruments provide climate measurements that continue prior observations by NASA's Earth Observing System (EOS).

^ "NPP Press Kit". NASA. Retrieved 6 January 2021. This article incorporates text from this source, which is in the public domain.
^ @NASAKennedy. "#NPP's official liftoff time was 02:48:01.828 PDT". Twitter. Retrieved 17 August 2013. This article incorporates text from this source, which is in the public domain.
^ "NPP Satellite details 2011-061A NORAD 37849". N2YO. 25 January 2015. Retrieved 25 January 2015.

[presskit-1] "NPP Press Kit". NASA. Retrieved 6 January 2021. This article incorporates text from this source, which is in the public domain.

[2] @NASAKennedy. "#NPP's official liftoff time was 02:48:01.828 PDT". Twitter. Retrieved 17 August 2013. This article incorporates text from this source, which is in the public domain.

[n2yo-3] "NPP Satellite details 2011-061A NORAD 37849". N2YO. 25 January 2015. Retrieved 25 January 2015.

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