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Federal Harris County (TX)
Unidentified Frequencies
Unidentified federal frequencies monitored in Harris County, Texas:
VHF-High
141.6125 FFF NAC encrypted?
162.2375 analog, CC hit around the Eastex and 610, informal conversation
162.7875 M 839 NAC Marshals?
163.1 M DES
163.65 052 NAC ICE? P25 encrypted (heard during FBI fugitive search in Fort Bend County area)
163.7 M 206.5 PL voice
163.8125 M P25 encrypted
164.45 M 151.4 PL car-to-car talk
164.55 M OCDETF? DES
164.625 R 107.2 PL Fish and Wildlife Service? analog voice
165.025 M CSQ heard during Hurricane Gustav
165.075 M? 293 NAC encrypted
165.6375 M 100.0 PL ?
165.825 M 060 NAC ICE? (used during NCAA Final Four 2011)
166.4625 M CSQ Federal Common (analog unencrypted and DES encryption)
166.5125 M 001 NAC Secret Service/WHCA?
167.0375 M 001 NAC USSS Presidential Detail? (heard in days before Obama visit)
167.2125 EMWIN Data?
167.5125 M? FBI? DES?
167.5375 M FBI? DES
168.35 M DES, analog voice
168.35 M P25
168.525 S VAMC? Paging Data
168.6125 M very weak/broken voice
168.7 M CSQ National Incident Radio Support Cache (NIRSC) Command 1? - analog voice and DES, surveillance
168.8625 M OCDETF? DES
169.325 I? 293 NAC FAA input?
169.6375 data bursts, P25?
170.725 M analog simplex voice during Hurricane Gustav
170.8 M 293 NAC Marshals? encrypted
170.825 M FBI? DES
170.9125 M? 167 NAC FBI?
171.025 R IFLOWS/Harris County Flood Alert System - League City repeater output, unconfirmed
171.2 M DOE? NEST? - brief analog voice (NCAA Final Four 2011), also P25 or intermod?
171.3125 trunked control channel? very weak in Houston during good conditions
171.6125 M 864 NAC ?
172.0625 M? P25?
172.9 R CSQ somewhere near IAH airport
172.95 R? 293 NAC FAA?
173.05 S? chirping sound data
173.1625 R? P25?
173.875 R 94.8 PL US Capitol Police "Travel 3" (Giffords detail at Hermann TIRR)
173.8875 M? ATFE Tactical 6? - P25 encrypted
The Organized Crime Drug Enforcement Task Force (OCDETF) is a multi-agency federal task force (commonly associated with the FBI although many other agencies participate). The DES frequencies above remain in use after the FBI's conversion to P25 in the Houston area. These frequencies may be used by OCDETF because they may be maintained for compatibility with other agencies on VHF-high that have not yet converted to P25 (e.g., CBP/ICE). Some of these frequencies are also reported as nationwide FBI frequencies.
Presumed Obsolete
167.5125 R? 167.9 PL FBI? lots of key-ups with weak signal (same time as 173.025), feedback/squeaking, weak voice
168.925 R 167.9 PL reported in MT Fed Files
170.025 R? 167.9 PL FBI? weak, open mic/keyed-up dead air/static
171.175 R 167.9 PL FBI? near IAH airport, open mic/keyed-up dead air (this may be obsolete, now P25)
173.025 R? 167.9 PL FBI? lots of key-ups with weak signal (same time as 167.5125), DES
173.1 R? 167.9 PL FBI? open mic dead air, DES
UHF
411.7875 M? 293 NAC Coast Guard? keyed-up for 3 seconds with a high pitch tone (NCAA Final Four 2011)
412.4375 206.5 PL constant dead carrier around UH Clear Lake/JSC area
413.1 M 293 NAC Diplomatic Security Service Agent 3?
414.5625 M 168 NAC encrypted
414.5625 M 169 NAC encrypted
414.75 M 169 NAC encrypted
Federal Aviation
Bases
- Army National Guard (Apache helicopters) - Ellington International Airport (Houston)
- Army Reserve (Apache helicopters) - Lone Star Executive Airport (Conroe)
- CBP - Hooks Airport (Houston) as of April 2012 (per monitored traffic) - Hooks as of January 2011 source - may be moving to Conroe (per monitored traffic May 2012)
- Coast Guard - Ellington International Airport (Houston)
- DEA - Lone Star Executive Airport (Conroe) - source source source
- FBI - West Houston Airport (Houston) - identified via monitoring
- NASA - Ellington International Airport (Houston)
CBP Aircraft
The following CBP aircraft have been noted operating the Houston region.
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