Polar Operational Environmental Satellites

Last updated

The Polar-orbiting Operational Environmental Satellites (POES) were a constellation of polar orbiting weather satellites funded by the National Oceanic and Atmospheric Administration (NOAA) and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) with the intent of improving the accuracy and detail of weather analysis and forecasting. [1] The spacecraft were provided by NASA and the European Space Agency (ESA), and NASA's Goddard Space Flight Center oversaw the manufacture, integration and test of the NASA-provided TIROS satellites. [2] The first polar-orbiting weather satellite launched as part of the POES constellation was the Television Infrared Observation Satellite-N (TIROS-N), which was launched on 13 October 1978. The final spacecraft, NOAA-19 (NOAA-N Prime), was launched on 6 February 2009. [3] The ESA-provided MetOp satellite operated by EUMETSAT utilize POES-heritage instruments for the purpose of data continuity.

Contents

On-orbit satellite operations of POES were performed by NOAA's Office of Satellite and Product Operations (OSPO). [4]

On 19 August 2025, the final POES satellite (NOAA-15) was decommissioned and removed from service. [5] The Joint Polar Satellite System, which was launched on 18 November 2017, is the successor to the POES Program. [6]

Daily global coverage

Notational local equatorial crossing times, showing POES (and other) satellites. Operational polar satellites.jpg
Notational local equatorial crossing times, showing POES (and other) satellites.

Each POES satellite completes roughly 14.1 orbits per day. Since the number of orbits per day is not an integer, the ground tracks do not repeat on a daily basis. The system includes both morning and afternoon satellites which provide global coverage four times daily. [4]

Applications

Data from the POES support a broad range of environmental monitoring applications including weather analysis and forecasting, climate research and prediction, global sea surface temperature measurements, atmospheric soundings of temperature and humidity, ocean dynamics research, volcanic eruption monitoring, forest fire detection, global vegetation analysis, search and rescue, and many other applications. [4]

One of the key instruments of the POES system is the High Resolution Infrared Radiation Sounder (HIRS/4). HIRS/4 senses within 20 channels ranging from visible bands to long wave infrared (0.69-14.96 micron wavelengths), to sense variation of temperature, humidity, and pressures within the atmosphere. [3] The data collected from HIRS/4 is collaboratively used with the Advanced Microwave Sounding Unit (AMSU) to advance research in sea surface temperatures, cloud coverage analysis, ozone concentrations throughout the atmosphere and earth's radiance. [2] [3]

SARSAT

POES has been used by the Search and Rescue community since 1982. COSPAS-SARSAT is the international humanitarian Search and Rescue Satellite-Aided Tracking System that is responsible for alerting and locating information to search and rescue authorities. COSPAS-SARSAT satellites detect 406 MHz distress signals at all times from nearly any place on the globe. Each 406 MHz beacon has a unique fifteen digit identification (ID) code embedded within its signal which allows rescuers to have an identification of the party in distress before they head out on the rescue. There is no charge for this service provided in conjunction with National Oceanic and Atmospheric Administration (NOAA) and SARSAT. [7]

Mission

MetOp

The MetOp missions are not part of POES, but use POES heritage instruments.

See also

References

  1. "EUMETSAT Polar System - Programme Background". EUMETSAT. Archived from the original on 23 November 2008.
  2. 1 2 "POES Project". NASA. Archived from the original on 26 September 2008.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  3. 1 2 3 "POES". poes.gsfc.nasa.gov. NASA. Retrieved 19 March 2017.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  4. 1 2 3 "Polar Orbiting Satellites". NOAA. Archived from the original on 20 December 2007.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  5. "Suspension of POES data to Users after June 16, 2025 and Decommissioning" NOAA. Retrieved 19 August 2025.
  6. "NOAA/NASA Joint Polar Satellite System (JPSS) Management Control Plan (MCP) 2013" (PDF). January 2013.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  7. "COSPAS SARSAT - Search and Rescue Satellite Aided Tracking System" (PDF). NOAA. Archived (PDF) from the original on 19 March 2017. Retrieved 21 March 2017.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  8. "MetOp-B Launches with NASA Goddard-Developed Instruments". NASA Retrieved: 21 June 2012 PD-icon.svg This article incorporates text from this source, which is in the public domain .