measuring the azimuth dependence of birdies

     The azimuth spins that have been done to measure birdie direction are collected here so that they can be compared. These spins also give an idea of the sidelobe response of the telescope from the direction of the birdie.

• 05oct01 :  1350 Mhz tone. radar blanker on. az swing at .2 deg/sec. Dome at 19 deg za. center plot smoothed to 11*.2=2.2 degrees.
• 01mar02: 1400 Mhz birdie . .4 deg/sec az swing with dome at 18 degs za.
• 29jun04: 1400 Mhz birdie  .4deg/sec az swing. dome at 18 deg za. rbw:190 hz. The center plot shows the response of the 1400.000 Mhz  birdie that comes from the control room.
• 23oct02 : 410 Mhz birdie from the tower in aguada. See figures 3 and 4. Spin at .4 degs/sec with dome at 18 degrees za. The tower is at an azimuth of 275 deg (via gps receiver). We measured a 275 deg az with a yaggi from the dome. The 430 system via the dome has a peak at 150 degrees. This is 90 deg from tower8 cables.
• 19jun03: 427.75 Mhz Tv chn 14,chn22 intermods. .4 deg/sec az swing with dome at 19 degs za. Peaks at az=124
• 19jun03: 426.25 Mhz birdie. .4 deg/sec az swing with dome at 19deg za. Peaks at az=301 deg.
• 19jun03:  432.0 Mhz birdie.    No az dependence. It must be inside the dome.
• az,za  dependence of faa, aerostat, remy, punta salinas using  1 second sampling.
• 28sep04: az dependence of faa radar compression in alfa receiver.   Az swing 270 to 630 at .3 deg/sec. Use alfa and dump data every 64 useconds.
• 28oct05: azimuth dependence of birdies in the 327 Mhz rcvr.
• 312.3 Mhz is 3rd harmonic of 104.1 fm station  in Utuado (shows az dependence).
• 18jul06: az, za dependence of birdies xmitted from the control room and parking lot.
• 04oct06: az,za dependence of 614 khz comb in 327 Mhz rcvr. Comb was coming from the az2 encoder on the platform. The za dependence shows how the metal on the platform was shielding the source. We also did a strip moving the ch while az,dome remained stationary. This also showed a change.

Az spin data sets: