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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Controller claims that radio receivers have an echo sound caused by 2 radio sites transmitting at the same time.
| Attributes | |
| ACN | 254501 |
| Time | |
| Date | 199310 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : bos |
| State Reference | MA |
| Altitude | msl bound lower : 35000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw |
| Operator | other |
| Make Model Name | Military Transport |
| Flight Phase | cruise other |
| Route In Use | enroute : atlantic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 5 controller radar : 5 |
| ASRS Report | 254501 |
| Person 2 | |
| Affiliation | government : military |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : military |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
Mlt X at FL350 acknowledged a frequency change on 133.45. I received his xmissions on both sites (ewb and qya). One of the sites appeared to have a half second delay causing his response to be slightly garbled. This has happened in the past. Position, type of aircraft, and altitudes do not seem to make a difference. Sometimes it happens, sometimes it does not. Position at time of occurrence: bos 067 degree. -- 103 mi at FL350.
Original NASA ASRS Text
Title: CTLR CLAIMS THAT RADIO RECEIVERS HAVE AN ECHO SOUND CAUSED BY 2 RADIO SITES XMITTING AT THE SAME TIME.
Narrative: MLT X AT FL350 ACKNOWLEDGED A FREQ CHANGE ON 133.45. I RECEIVED HIS XMISSIONS ON BOTH SITES (EWB AND QYA). ONE OF THE SITES APPEARED TO HAVE A HALF SECOND DELAY CAUSING HIS RESPONSE TO BE SLIGHTLY GARBLED. THIS HAS HAPPENED IN THE PAST. POS, TYPE OF ACFT, AND ALTS DO NOT SEEM TO MAKE A DIFFERENCE. SOMETIMES IT HAPPENS, SOMETIMES IT DOES NOT. POS AT TIME OF OCCURRENCE: BOS 067 DEG. -- 103 MI AT FL350.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.