# ====================================================================== # QMAP 10Nov96 - Flight 2 # ======================= # # Analysis Parameters - version 10apr98.par # ------------------- # # ---------------------------------------------------------------------- # 23apr97 th first run (see below) # 22jun97 th contains best-fit phase, and CAL # 24jun97 th contains CAL -> K calibration and beams # 25jun97 th corrected relative beam positions, added lvdt1 zero point # 11jul97 th same as 25jun97, but better beam fits # 20jan98 th same as 11jul97, but calibration with more digits # 21jan98 th regularized phases and beam fits based on widths of # combined pair beams # 26jan98 th new Cas A calibration, including # - new center freqs based on guesses of square bandpasses # - new fit of Cas A including Mezger and Chini # - fractional decay model # - errors include freq uncertainty (1 GHz each) # 10apr98 th improved Cas A calibration, including # - measured center frequencies # - 1998eml calibration for Cas A # 13apr98 th final beam fit including systematic errors # ====================================================================== # # date of observations and parameters obs_date 96 11 10 par_date 98 04 13 # # ccd scale wide or narrow, x and y, in cpix/pdeg ccd_scale_w 4299.6 -4154.8 ccd_scale_n 6084.8 -5861.4 # # phase chopper -> radiometry, in syncs phase_rc_Ka1 -57110.4 # these are the current best-fit phases and phase_rc_Ka2 -57110.4 # contain the large radiometry->chopper offset phase_rc_Q1 -56934.3 # now regularized by integer chop numbers phase_rc_Q2 -56934.3 # to synchronize start of cal spikes phase_rc_Q3 -57022.9 phase_rc_Q4 -57022.9 phase_rc_D 0 # not yet known (will it ever be?) # # phase pointing -> chopper, in syncs phase_cp -35840 # use this for now # # which UT to use: # 0 - data PC (associate by frame #) # 1 - GPS # 2 - pointing PC use_UT 0 # # beam offsets to fiducial camera, az and el, in degrees # offsets get added to the az, el offset_Ka -1.35 5.13 # to the left and up - beam el 41.61 offset_Qa 1.35 5.14 # to the right and up - beam el 41.63 offset_Qb 1.30 2.56 # to the right and up - beam el 38.80 offset_D 0 0 # unknown # # lvdt1 zero point offset (added directly to chopper angle, in degrees) lvdt1_offset -0.515 # # sync time to seconds, in seconds/sync sync_secs 2944 # chopper is 4.6Hz for entire flight # # sync time offset to absolute time, seconds sync_abs 0 # # Radiometry Spike Calibration (counts -> CAL) # CAL = a_i * frame^i (i=0,4) cal_n_coeff 5 cal_foffset 0.0 cal_fscale 1.0 # # a0 a1 a2 a3 a4 cal_sp_Ka1 9771.8 -0.25804 8.6248e-6 -1.2310e-10 6.7362e-16 cal_sp_Ka2 18399.5 -0.58542 1.9427e-5 -2.7556e-10 1.5123e-15 cal_sp_Q1 2104.3 -0.07253 2.3339e-6 -3.2364e-11 1.7970e-16 cal_sp_Q2 4638.4 -0.10166 2.7159e-6 -2.5155e-11 6.6636e-17 cal_sp_Q3 3511.9 -0.11814 4.2792e-6 -6.8519e-11 4.3545e-16 cal_sp_Q4 3548.0 -0.07049 2.0753e-6 -2.4206e-11 1.1328e-16 cal_sp_D 1.0 0.0 0.0 0.0 0.0 # # Calibration of the spikes # K/CAL +/- tcal_Ka1 1.147 0.152 tcal_Ka2 1.699 0.194 tcal_Q1 0.543 0.054 tcal_Q2 0.705 0.070 tcal_Q3 0.336 0.041 tcal_Q4 0.506 0.062 # # Beam Shapes # FWHM (deg) major +/- minor +/- pa +/- beam_Ka1 0.932 0.006 0.831 0.005 beam_Ka2 0.932 0.006 0.831 0.005 beam_Q1 0.674 0.010 0.616 0.009 beam_Q2 0.674 0.010 0.616 0.009 beam_Q3 0.730 0.012 0.694 0.012 beam_Q4 0.730 0.012 0.694 0.012 # # ====================================================================== # State # ----- # # The beams of each pair have now been combined and fitted together. # The fits for the peak of each individual channel have been constrained # to the beam widths of combined beams, while peak and offsets remain # free. # # We are now using the final beam calibration, which includes an # estimate of systematic errors. # # The phases have been regularized by requiring synchronicity of the # first CAL spike of the flight. For this, only integer chops were # added. # ======================================================================