In this video at 1:56, you can see 113.375 is listed as a "transmitter frequency". However, I cannot find that frequency anywhere in the database. Does anyone know what it is?
113.375 at SFO
- Thread starter ScanRafael
- Start date
FCC Callsign WRXD511 (City and County of San Francisco)
Ground Based Augmentation System (GBAS) | SKYbrary Aviation Safety
GBAS Landing System (GLS) | SKYbrary Aviation Safety
https://www.faa.gov/documentLibrary/media/Order/6050.32B_with_Changes_1_2_3.pdf Appendix 6 (PDF page 463) has the emissions designator that corresponds to the FCC license (14K0G7D)
https://www.faa.gov/air_traffic/publications/atpubs/aim_html/chap1_section_1.html AIM 1-1-19 b. and c. provide a good explanation as well
It's the GBAS Ground Facility (GGF) for their Ground Based Augmentation System (GBAS) Landing System (GLS) approaches. Currently referred to as GBAS and previously referred to as Local Area Augmentation System (LAAS). Really cool tech, it augments GPS signals to provide corrections just like WAAS. The fundamental difference is that this system broadcasts corrections via VHF (113.375 in this case) to provide lower latency corrections for aircraft shooting approaches whereas WAAS sends the signal to a master controller, up to a satellite in geosynchronous orbit and broadcast back down. The goal is for these GLS approaches to be used for CAT II & CAT III ops and even autoland, like the ILS system of today.
Ground Based Augmentation System (GBAS) | SKYbrary Aviation Safety
GBAS Landing System (GLS) | SKYbrary Aviation Safety
https://www.faa.gov/documentLibrary/media/Order/6050.32B_with_Changes_1_2_3.pdf Appendix 6 (PDF page 463) has the emissions designator that corresponds to the FCC license (14K0G7D)
https://www.faa.gov/air_traffic/publications/atpubs/aim_html/chap1_section_1.html AIM 1-1-19 b. and c. provide a good explanation as well
It's the GBAS Ground Facility (GGF) for their Ground Based Augmentation System (GBAS) Landing System (GLS) approaches. Currently referred to as GBAS and previously referred to as Local Area Augmentation System (LAAS). Really cool tech, it augments GPS signals to provide corrections just like WAAS. The fundamental difference is that this system broadcasts corrections via VHF (113.375 in this case) to provide lower latency corrections for aircraft shooting approaches whereas WAAS sends the signal to a master controller, up to a satellite in geosynchronous orbit and broadcast back down. The goal is for these GLS approaches to be used for CAT II & CAT III ops and even autoland, like the ILS system of today.
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