Another hot sunny day. Winds were a little lighter today, but still mostly southerly.
Today we did some more tidying and sorting equipment around the site. We still don't have power (apparently the electrician should come tomorrow) so Isabel and David mostly helped ISFS assemble towers. Josh helped Chenning and his students get a truckload of pipes from Hawthorne for the fiber optic temperature sensor line and also brought supplies for ISS. The REAL lidar trailer arrived this afternoon and we helped position that. The position is carefully coordinated with the ISFS tower array and the lidars that we will be deploying.
I also spent some time tracking down a potential radio interference signal for the Modular Profiler. There is a constant narrow-band signal at about 451.4 MHz with a bandwidth of around 10 kHz. Using a directional antenna at multiple sites around the valley and town indicated that it comes from a cluster of radio towers on a hill next to Mount Butler just south of Tonopah. The location is approximately 38° 3' 7" N, 117° 13' 36" W. This location is about 12 km from ISS with a bearing of 276 deg. It should be possible to avoid this interference by carefully orientating the Modular Profiler antenna to point a null in the radiation pattern in that direction and by careful setup of the clutter screen.
Using a directional antenna and handheld spectrum analyzer to determine the location of a 451 MHz radio signal, which appears to be a cluster of antennas on a hill just south of Tonopah.
Bruce, Shane, and Isabel setting the Chico State University REAL lidar trailer adjacent to the ISS site.