Meteor Trail Reflection Viewer
Reeve Observatory - Anchorage, Alaska USA
Geographic coordinates: 61.19928 °N : 149.95652 °W
Home All times are in Coordinated Universal Time (UTC)
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All times are in Coordinated Universal Time (UTC)
The spectrogram on this page is not continuously active. When active, it automatically reloads every 4 minutes but the plots themselves are uploaded at an interval determined by the time scale
Narrowband Spectrum Monitor: One or two Icom R-75 general coverage receivers on an HF log periodic antenna
The chart shows the relative frequency of one or two signals over time; usually the higher frequency is above chart center Frequencies monitored usually are WWV and WWVH time services on 5, 10, 15, 20 and 25 MHz but other frequencies may be used (see note below). The vertical scale is in Hz and shows the approximate offset of the received signal from the transmitted carrier frequency. The signal level is under control of the software automatic gain control.
Note: As of summer 2018, the trace at 1000 Hz, if present, is the United States time service WWV on 25 MHz. Other traces may be present at other frequencies but these are spurious receiver responses. The R-75 (A) receiver is set to LSB and tuned to 25.001 000 MHz. The HF log periodic dipole array antenna associated with this receiver is pointed 107° True azimuth toward WWV.
Meteor Monitor commissioned 7 June, 2014