The Yuma2 sensor was Designed by Dave Nelson and Brett Nordgren with additions from others.
The sensor output is monitored using the program Winsdr at 50 sps using a 10 vt input and utilizing GPS for time reference. The channel recordings are saved unfiltered. The display channels are updated every 15 minutes.
The high gain channel display is low pass filtered at 0.070 hz and high passed filtered at 0.02 hz. The scale factor is 2. The high gain sensor sensitivity = 72,500 V-sec/m giving clipping level 130um/sec .
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The low gain channel display is low pass filtered at 10.0 hz and high passed filtered at 0.02 hz. The scale factor is 2. The sensor sensitivity = 580 V-sec/m giving clipping level 1.7 cm/sec .
The following graph was the result of 8 hours of recording on 02/10/13 during a quiet period. It shows the three Yuma recording PSD's and the Related noise PSD's. In the graph is the New Low Noise Model - NLNM.