| Setup | Setting | Comment |
|---|
| Center Freq | 1417 MHz | |
| LO tracking | None (Topocentric) | Best for rfi identification; unfortunately
Doppler correction, although computed, not recorded in FITS file. |
| Bandwidth | 12.5 MHz | |
| Sampling | 9 level auto | Best for sensitivity and rfi mitigation |
| # channels | 2048/pol | (9 level reduces total # chans by half) |
| Drift length | 480 seconds | The drift then lasts 8 minutes, and is set
to begin when Beam 0 crosses RA(NGC2903) - 4 min. The CAL time is
additional. |
| Cal mode | loopend or loopstart | All except Dec03 done in loop end.
LIVEDATA requires loop start which Mary used on 12/03. However, then the actual drift
start/stop times are not fixed, and this complicates true position checking vs. header
positions (needed for continuum tests). Concerns raised about possible firing of cal on top
of continuum source if fired at fixed point on sky throughout night. Mikael will add
option for loopstart+loopend before run 2.
Note that it takes 7 or 8 seconds beyond the end of the 480 sec drift to complete the
1 sec CalON plus 1 sec CalOFF. If we decide to select loopstart+loopend, that may require
an additional overhead of 5-8 secs. |
| CIMA files | FixedAzdrift | Sources /home/lerner/fixedAZ2.tcl
(executive) and /home/lerner/fixedAZ2_widget.tcl (gui) |
| | "Saved state" | a1963_hiline.gui |