I found the frequency 5.574 listed in the FCC database licensed to several locations throughout the United States. Does anyone know what this is supposed to be used for?
Frequency: 5.574 MHz
Licensee: Aviation Spectrum Resources Inc
Emission mode: 2K80J3E
Control Point: 6011 INDUSTRIAL WAY, ALAMEDA, LIVERMORE, CA P: (925)294-8400
KBP3 Minneapolis, MN (MSP)
KMA7 Dixon, CA
KMI4 Boston, MA (Logan)
KQO2 New York, NY (La Guardia)
KRD6 Fort Worth, TX (Fort Worth Alliance)
WCI4 Detroit, MI (DTW)
WKJ2 Boston, MA (Logan)
WLV6 Tulsa, OK (Tulsa International)
WQCH824 Phoenix, AZ (Sky Harbor International)
WZK4 Anchorage, AK (Anchorage International)
Frequency: 5.574 MHz
Licensee: Aviation Spectrum Resources Inc
Emission mode: 2K80J3E
Control Point: 6011 INDUSTRIAL WAY, ALAMEDA, LIVERMORE, CA P: (925)294-8400
KBP3 Minneapolis, MN (MSP)
KMA7 Dixon, CA
KMI4 Boston, MA (Logan)
KQO2 New York, NY (La Guardia)
KRD6 Fort Worth, TX (Fort Worth Alliance)
WCI4 Detroit, MI (DTW)
WKJ2 Boston, MA (Logan)
WLV6 Tulsa, OK (Tulsa International)
WQCH824 Phoenix, AZ (Sky Harbor International)
WZK4 Anchorage, AK (Anchorage International)