NIKA October 10th, 2014 / S4
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2014-10-10
Opacity is measured with the new taumeter at 225 GHz
Nasmyth offsets : -19, 5.8
Set pointing : 0, 0
Set Focus : -2.4 mm
- Quick description of the session: measure polarization of quasars at various elevations and planets to test our system and calibrate
Polarizer on, HWP on but not turning at session start
Data Repository: Raw_X9
Acquisition = 39.7 Hz
Observing account: t21
Remark after few scans: TAPAS is working now, we see the scans, but we continue the manual log just in case.
Scan |
UT |
Source |
Command |
Az |
El |
Pointing X, Y, Focus |
Tau225 |
Comment |
1-3 |
00h46 |
Uranus |
Track off -200 -200 |
208 |
54 |
0,0,-2.4 |
0.2 |
Tuning. We started a bit late, the time that ice melts and sky clears ! |
4 |
00h50 |
Uranus |
cross |
208 |
54 |
0,0,-2.4 |
0.2 |
|
5 |
00h56 |
Uranus |
cross |
213 |
53 |
0,0,-2.4 |
0.1 |
Problem processing the scan |
6 |
01h00 |
Uranus |
cross |
213 |
53 |
0,0,-2.4 |
0.1 |
|
7 |
01h03 |
Uranus |
cross |
213 |
53 |
-2.5,6.4,-2.4 |
0.1 |
set pointing -2.5 6.4 |
8 |
01h08 |
Uranus |
focusp |
213 |
53 |
-2.5,6.4,-2.4 |
0.1 |
|
9 |
01h03 |
Uranus |
cross |
213 |
53 |
-2.5,6.4,-2.0 |
0.1 |
set focus -2.0 |
10 |
01h08 |
Uranus |
focusp |
213 |
53 |
3.5,-3.8,-2.0 |
0.1 |
Jumps in data, bad for processing |
11 |
01h17 |
Uranus |
focusp |
220 |
51 |
3.5,-3.8,-2.0 |
0.1 |
|
12 |
01h25 |
Uranus |
otfgeom_25 |
220 |
49 |
3.5,-3.8,-2.0 |
0.1 |
certainly not well focussed, so do another one in few scans |
13 |
01h38 |
Uranus |
focusp |
225 |
48 |
3.5,-3.8,-2.0 |
0.1 |
|
14-18 |
01h45 |
Uranus |
focusliss |
225 |
48 |
3.5,-3.8,-2.0 |
0.1 |
|
19-23 |
01h52 |
Uranus |
focusliss |
225 |
48 |
3.5,-3.8,-1.4 |
0.1 |
|
24-28 |
01h55 |
Uranus |
focusliss |
225 |
48 |
3.5,-3.8,-1.4 |
0.1 |
we were visibly completely out of focus in preceeding scans |