Telescope/instrument: GBT/Zpectrometer
    Project: 9A40
    Session: 5
    Date(s):  29 May 09 (06:00-09:30 EDT)
    Observer(s): A. Harris (GB) + A. Edge (Durham) + A. Baker (NJ)
    Operator: G. Monk
    Conditions: low clouds, fog at GBT, dry ground after last night's rains
    Data: /home/scratch/aharris/9A40/02

SCAN SCRIPT SOURCE
 LST
 UT AZ
 EL
 dT dAZ
 dEL Offset
 COMMENTS




9:01





Taking over from M. Morris, poor Tsys at Q-band.

startup
20:19
 9:11





Includes atten0-3=0,0,2,0.
1-5
 point
 VeryNearEye
 20:21
 9:12


0.000 ->
-0.003
 0.000 ->
0.183
 -20.052
 VeryNearEye; 1-4 VG pks 375 az, 743,  795, el  focus 766
6-10
 point
 VeryNearEye 20:26
 09:17
 155
 46
-0.003 ->
0.035, 0.038
 0.183 ->
0.188, 0.005
VeryNearEye, better curves, all VG/E: 872, 912, 844, 869 focus 840
DCR Tsys 84 K, wind 2 m/s (calm at ground level), 14.9 C

config-totpwr
20:47
 10:17





Includes atten0-3=0,0,2,0 and cwcal from 9A40 session 1.











check atten: 0,0,1,0  (could also do 0,0,2,0)

config-totpr









11-13
 4x obs-fastnod
 VeryNearEye 20:38
 09:18
 159
 48
 60



14-15









abort; fastnod on cal instead of fastnod2 on source
16-29
 7x obs-fastnod2-9A40
 Eye_p1, Eye_p2
 20:45
 09:37
 160
 49
 240


TotPwr 0.013.  Getting light -- low clouds, don't look that thick.  Dish is clear but feed arm is in a low cloud.  No ripples in 16/17 (no line, either).  Line emerging after first three pairs.  Minor ripples too.  22 has flux offset, 24 has larger, maybe not so good; TotPwr 0.026.  26 has low offset but strong ripple.  Weather is now foggy.
30-31
 2x obs-fastnod
 VeryNearEye 21:44
 10:35

60


souce just transited
32-36
 point
 VeryNearEye 21:47
 10:38
 185
 50
0.035 -> 0.080, 0.045

 0.188 -> 0.143, -0.045
VeryNearEye.  VG: 865, 900, 764, 862, focus 755 (cf. 840 above)
DCR Tsys 80 K

config-totpwr









37-38
 2x obs-fastnod VeryNearEye 21:52
 10:43
 187
 50
 60



39-52
 7x obs-fastnod2-9A40 Eye_p1, Eye_p2 21:54
 10:46
 188
 50
 240


Sun's on the dish 11;16 (07:16 EST), but feed arm is in low clouds.  Pretty clear in general, mix of clouds and blue sky.
47 has ripple
53-54
 2z obs-fastnod VeryNearEye 22:54
 11:45
 209
 46
 60



55-59
 point VeryNearEye 22:58
 11:47
 210
 45
0.080  -> 0.108, 0.028 0.143 -> 0.166, 0.023
VeryNearEye.  VG 754, 811, 850, 889, focus 815 (cf. 755, 840) 

config-totpwr









60-61
 2x obs-fastnod
 VeryNearEye 23:02
 11:53

60



62-69
 3x obs-fastnod2-9A40 Eye_p1, Eye_p2 23:05
 11:56
 212
 46
 240


62 high ripple
70
 obs-fastnod VeryNearEye 23:38
 12:29
 223
 41
 60


3 m/s wind (calm outside buildling), 17C

shutdown








AJB notes that LO1B was on standby, a leftover from last night's cals.




































    Notes:
    (1) All script names within Astrid are "zpec08-" + string listed in script column above (unless otherwise noted).