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Spectrum Summary of GBT Receiver Bands. Caveat Emptor:

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spectrum summary of gbt receiver bands

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.

pf1 1 290 mhz 395 mhz
PF1.1: 290 MHz – 395 MHz

Military Aircraft (225 MHz – 400 MHz) Evers MOA and others

Leaky Local Cable TV, Part 15 devices, unintentional sources

pf1 3 510 mhz 690 mhz
PF1.3: 510 MHz – 690 MHz

RA Band

Digital Channels

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.

pf1 4 680 mhz 920 mhz
PF1.4: 680 MHz – 920 MHz

Airphone Services

Land Mobile

UHF TV

Radiolocation

Power line? Welding? Fluorescent lights?

902-928 ISM band

Intentional Radiators

pf2 910 mhz 1230 mhz
PF2: 910 MHz – 1230 MHz

Radiolocation/ISM

Fixed/Mobile (various)

Aeronautical Radionavigation (mobile and land based)

l band 1150 mhz 1730 mhz
L Band: 1150 MHz – 1730 MHz

Notch Filter designed to keep radar at Roanoke Airport from overloading receiver.

GEOS or NOAA WX ?

IRIDIUM: 1621 - 1627

GPS L1: 1575.42

L2: 1227.6

L3: 1381.05

Aeronautical Radionavigation

s band 1730 mhz 2600 mhz
S Band: 1730 MHz – 2600 MHz

2320 – 2360 Sirus and XM Broadcast Satellites

2400 – 2483.5 ISM band

Unlicensed Intentional Radiators

All Az, filtered, 2/8/02

above s band
Above S Band
  • Generally, less terrestrial sources and more satellite and airborne sources. A few possibilities:
    • 3700-4200 MHz: geostationary satellite TV downlinks
    • 5725-5850 MHz: ISM band Unlicensed Intentional Radiators
    • 11.7-12.7 GHz: geostationary satellite TV downlinks