BackForwardInstrument:  S&RSAT 

Instrument details
Acronym S&RSAT
Full name Search & Rescue Satellite-Aided Tracking System
Purpose To relay distress signals from users in difficulty to search and rescue centres, and locate the source
Short description Transponder of signals from ground-based beacons transmitting emergency message at 406 MHz and, untill 2009, 121.5 and 243 MHz. Messages and Doppler information for location are relayed to Local User Terminals for re-addressing to a control centre that activates the appropriate rescue organisation
Background Part of the international COSPAS/SARSAT Search & Rescue system agreed by Canada, France, Russia and USA and subscribed by further 37 States and 2 Organisations
Scanning Technique N/A
Resolution N/A
Coverage / Cycle Global, twice/day
Mass 51.5 kg Power 86 W Data Rate 2.4 kbps


Providing Agency NOAA
Instrument Maturity Flown on operational programme
Utilization Period: 1983 to 2026
Last update: 2016-07-01
Detailed characteristics
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Other payload component
  • Search and Rescue system
WIGOS Subcomponents No WIGOS subcomponents have been defined.
Mission objectives
No mission objectives have been defined.
Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

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Note: * Primary mission objective.