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GOES, POES, & MetOp Weather Satellites
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The U.S. National Oceanographic and Atmospheric Administration (NOAA) operates various weather satellites. Some of the satellites are geostationary (Geostationary Operational Environmental Satellites, or GOES), and others are in polar low Earth orbits (Polar Orbiting Environmental Satellites, or POES).
The first of the next-generation polar-orbiting satellites, known as Suomi NPP (National Polar-orbiting Partnership), was launched on October 28th, 2011. An additional next-gen satellite launch is scheduled for 2017.
As a result of the 2012 Middle Class Tax Relief and Jobs Creation Act, POES, GOES, and MetOp satellites use some spectrum that is shared by, or adjacent to, the 1695-1710 MHz portion of the AWS-3 spectrum. This segment is used for uplinks from mobile devices to base stations. To mitigate interference to NOAA operations, the government has issued an RFP for an RF Interference Management System (RFIMS), which will be installed at the 17 official NOAA ground stations, listen for interference, and alert mobile network operators in real time that mitigation measures are needed. The RFIMS concept was first proposed by the Commerce Spectrum Management Advisory Committee (CSMAC).
Three legacy satellites in the GOES series are: GOES-East, also known as GOES-13, at 75 deg W; GOES-West, also known as GOES-15, at 135.4 deg W; and GOES-Spare, also known as GOES-14, parked at 104.6 deg W. The next generation of satellites began with the launch of GOES-R on November 19th, 2016. Four satellites are planned in the series, GOES-R, GOES-S, GOES-T, and GOES-U. When fully operational, GOES-R will be renamed GOES-16. The ultimate orbit location for GOES-16 is to be determined.
Details of the signals transmitted by the satellites are provided in the linked presentation.
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Frequencies |
Frequency | Bandwidth | Use | Service | Table |
137.1 MHz | 34 kHz | POES Automatic Picture Transmission (APT) downlink | Meteorological-satellite (space-to-Earth) | F |
137.5 MHz | 34 kHz | POES Automatic Picture Transmission (APT) downlink | Meteorological-satellite (space-to-Earth) | F |
137.62 MHz | 34 kHz | POES Automatic Picture Transmission (APT) downlink | Meteorological-satellite (space-to-Earth) | F |
137.9125 MHz | 34 kHz | POES Automatic Picture Transmission (APT) downlink | Meteorological-satellite (space-to-Earth) | F |
1676 MHz | 5.2 MHz | Legacy GOES SDL downlink | Meteorological-satellite (space-to-Earth) | F |
1680 MHz | 475 kHz | GOES-R DCPR downlink | Meteorological-satellite (space-to-Earth) | F |
1681.5 MHz | 400 kHz | Legacy GOES MDL downlink | Meteorological-satellite (space-to-Earth) | F |
1685.7 MHz | 4.22 MHz | Legacy GOES GVAR downlink | Meteorological-satellite (space-to-Earth) | F |
1686.6 MHz | 10.9 MHz | GOES-R GRB downlink | Meteorological-satellite (space-to-Earth) | F |
1691 MHz | 586 kHz | Legacy GOES LRIT downlink | Meteorological-satellite (space-to-Earth) | F |
1692.7 MHz | 27 kHz | Legacy GOES EMWIN-N downlink | Meteorological-satellite (space-to-Earth) | F |
1693 MHz | 80 kHz | GOES-R CDA telemetry downlink | Meteorological-satellite (space-to-Earth) | F |
1694 MHz | 16 kHz | Legacy GOES CDA Telemetry downlink | Meteorological-satellite (space-to-Earth) | F |
1694.1 MHz | 1.205 MHz | GOES-R HRIT downlink | Meteorological-satellite (space-to-Earth) | F |
1694.5 MHz | 475 kHz | Legacy GOES DCPR downlink | Meteorological-satellite (space-to-Earth) | F |
1694.8 MHz | 475 kHz | Legacy GOES DCPR downlink | Meteorological-satellite (space-to-Earth) | F |
1698 MHz | 2.66 MHz | POES High Resolution Picture Transmission (HRPT) downlink | Meteorological-satellite (space-to-Earth) | F |
1698 MHz | 5.32 MHz | POES Local Area Coverage (LAC) and Global Area Coverage (GAC) downlink | Meteorological-satellite (space-to-Earth) | F |
1701.3 MHz | 4.5 MHz | MetOp Advanced High Resolution Picture Transmissions (AHRPT) downlink | Meteorological-satellite (space-to-Earth) | F |
1702.5 MHz | 5.32 MHz | POES Local Area Coverage (LAC) and Global Area Coverage (GAC) downlink | Meteorological-satellite (space-to-Earth) | F |
1702.5 MHz | 2.66 MHz | POES High Resolution Picture Transmission (HRPT) downlink | Meteorological-satellite (space-to-Earth) | F |
1707 MHz | 4.5 MHz | MetOp Advanced High Resolution Picture Transmissions (AHRPT) downlink | Meteorological-satellite | F |
1707 MHz | 5.32 MHz | POES Local Area Coverage (LAC) and Global Area Coverage (GAC) downlink | Meteorological-satellite (space-to-Earth) | F |
1707 MHz | 2.66 MHz | POES High Resolution Picture Transmission (HRPT) downlink | Meteorological-satellite | F |
1707 MHz | 12 MHz | Suomi NPP Low Data Rate (LDR) downlink | Meteorological-satellite (space-to-Earth) | F |
7812 MHz | 30 MHz | Suomi NPP High Data Rate (HDR) downlink | Meteorological-satellite (space-to-Earth) | F |
External Links:
Associated Files:
| DySpan_presentation_v2 Radio Frequency Interference Monitoring System for Weather Satellite Ground Stations: Challenges and Opportunities, presentation by NOAA at the DySPAN 2017 conf...
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Defense Satellite Communication System 3 (DSCS III)
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According to the U.S. Space Force:
Defense Satellite Communications System (DSCS) constellation provides long haul communications to users worldwide through contested environments.
DSCS supports: the defense communications system, the military’s ground mobile forces, airborne terminals, ships at sea, and Department of Defense (DOD).
The first DSCS III satellite was launched in October 1982. The final DSCS III satellite, B6, was launched in August 2003. In all, DSCS III successfully launched 14 satellites, six of which are still operational and continue to be used in various capacities, from operational communications in Southwest Asia to research and development of ground-based support capabilities.
Space and Missile Systems Center (SMC), Los Angeles Air Force Base, Calif., sustains the DSCS Space Segment contract.
DSCS III satellites support globally distributed DOD and national security users. Modifications made to these satellites will provide substantial capacity improvements through higher power amplifiers, more sensitive receivers, and additional antenna connectivity options. The DSCS communications payload includes six independent Super High Frequency (SHF) transponder channels. Three receive and five transmit antennas provide selectable options for Earth coverage, area coverage and/or spot beam coverage. A special purpose single-channel transponder is also on board.
DSCS satellites provide the capabilities needed for effective implementation of worldwide military communications. It can adapt rapidly to dynamic operating conditions and perform under stressed environments. DSCS operates with large or small terminals. DSCS’s independent channels group users by operational needs or geographical location by allocating receiver sensitivity and transmitter power, thus providing maximum efficiency.
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Paired Frequency Bands |
Paired Bands | Use | Service | Table |
7250 - 7750 MHz | DSCS III downlink | Mobile-satellite | F |
7900 - 8400 MHz | DSCS III uplink | Mobile-satellite | F |
Frequencies |
Frequency | Bandwidth | Use | Service | Table |
7600 MHz | - | DSCS III Beacon (A series satellites) | Mobile-satellite | F |
7604.705882 MHz | - | DSCS III Beacon (B series satellites) | Mobile-satellite | F |
8005.146484 MHz | - | DSCS III Channel 1 command uplink | Mobile-satellite | F |
8370.146484 MHz | - | DSCS III Channel 5 command uplink | Mobile-satellite | F |
External Links:
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