Spectrum Summary of GBT Receiver Bands. Caveat Emptor:
Many of these scans are old by as much as several years. Since there is no systematic archiving of GBT RFI scans, reporting is spotty, and an overview like this is difficult to piece together. Automated, archival monitoring of the RFI environment at Green Bank is one of the goals of our group.
Military Aircraft (225 MHz – 400 MHz) Evers MOA and others
Leaky Local Cable TV, Part 15 devices, unintentional sources
Spectrum dominated by UHF TV stations located outside NRQZ. Only Channel 37 (608 MHz - 614 MHz) really usable. The impending shift to digital broadcasting will only worsen the picture.
Power line? Welding? Fluorescent lights?
902-928 ISM band
Aeronautical Radionavigation (mobile and land based)
Notch Filter designed to keep radar at Roanoke Airport from overloading receiver.
GEOS or NOAA WX ?
IRIDIUM: 1621 - 1627
GPS L1: 1575.42
2320 – 2360 Sirus and XM Broadcast Satellites
2400 – 2483.5 ISM band
Unlicensed Intentional Radiators
All Az, filtered, 2/8/02