Meteor Trail Reflection Viewer

Reeve Observatory - Anchorage, Alaska  USA
Geographic coordinates: 61.19928 °N : 149.95652 °W

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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 13 July 2017, 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.

Signal indications may be due to meteor trail reflections and are shown as intermittent or drifting traces.
Frequency deviations or frequency disturbances may be due to rapid reconfiguration of Earth's ionosphere caused by sunrise and sunset or x-ray flux from a solar flare.

Meteor Monitor commissioned 7 June, 2014