1. What’s in W-band Level 1 Fits Data (or what I did while in Chile besides shoveling snow and breaking the telescope) Telescope pointing Time Ordered 100 Hz Data (TOD) House Keeping (voltages, temperatures, pressures, etc…) TOD (1 Hz) Clock and Trigger Data (100 Hz) Total Power TOD (100 Hz) Demodulated TOD (100 Hz) Quad TOD (100 Hz)

2. Data stored in FITS format Data is stored on Chicago machine: qufs.uchicago.edu My code: Fortran Plotting Routines: Hbook from CERNLIB FFT Code: CERNLIB My area ~hogann/L1read-fort I looked at W-band data collected April 2010 This is just the beginning. Did not have time to make all plots.

3. E2xE2x Voltage is sampled every 1.25  sec, for a duration of 125  sec. ADC performs 3 operations every 8000 samples (or 10 msec) 1.1120 samples out of 8000 samples are IGNORED since they are too near the edges of either the 4 Khz clock, or the 5 Hz clock. 2.An Average (E x 2 + E y 2 )/2 is calculated from the remaining 6880 samples. This is what we call TOTAL POWER DATA 3.An average (E x 2 - E y 2 )/2 is calculated from the remaining 6880 samples. We call this DEMODULATED data, because it takes out the effect of the 4Khz switching. 4.Offline, we can calculate the DOUBLE DEMODULATED (E x 2 - E y 2 )/2, using two successive 10 msec samples. Arithmetic Operations Done on Q1 Diodes inside the ADC (similar for Q2 diodes) 8000 1.25  sec samples (or 10 msec long) 125  sec. E2yE2y 250  sec (4 Khz) Pattern Repeats, except that the 2nd phase switch state has changed. The 2nd phase switch cycles at the rate of 5 Hz 20 msec long

4. millivolts Behavior of Module 1 Demodulated Diode Output versus Time pedestal triggers

5. Correlation between Q1 and Q2, U1 and U2 Diode gains are NOT equalized

6. mv 2 /Hz Telescope Scanning frequency Single (4Khz) Demodulated Data

7. mv 2 /Hz Double (4Khz, 50 Hz) Demodulated Data

8. mv 2 /Hz Total Power Data

9. There’s lots of useful things to look at: ADC nonlinearity behavior (B-mode glitching) Intensity to Polarization leakage (I-to-Q and I-to-U) Noise versus time (effect of clouds) Side Lobe This is a real need for QUIET 1. Not too many people are looking at W-band data.