In another Platteville experiment, the heater was cycled on and off at a 15-minute rate to try to induce electron number density changes in the D-region. Attempts were made to detect phase changes that would be indicative of number density changes. Frequencies of 10 kHz (OMEGA) and 60 kHz (WWVB) were monitored, but no effect could be seen greater than the natural phase variability. From all of the various experiments conducted so far, no effects have been observed that would indicate significant impact on telecommunications services from SPS power beam modification of the D- and E-regions.
RkJQdWJsaXNoZXIy MTU5NjU0Mg==