2016-10-24 - ASTE Observation Wiki

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[[Observing Log]]

** ASTE-165 Investigation of unstable signals of DASH345 [#uf138700]

- &color(red){&ref(dash345_20161024.log,,console log);};

*** 12CO(3-2) toward EP Aqr [#d9f35a56]

- UT01:24 aste16/ast0165/EAC2Up0.tune
-- 12CO(3-2) USB IF=5.8 MAC-HIGH

- UT01:35 LOST CONTROL PRIORITY just when scan monitor was launched...
-- envmon and asp-mon also wend away
-- Recovered just by taking the control priority again

- UT01:39 aste16/ast0165/EAC2Up0.start
- UT01:43 aste16/ast0165/EAC2Up0.start
- UT02:01 aste16/ast0165/EAC2Up0.start
-- Flat spectra were seen in the frequency domain on the line QLOOK
-- The flat spectra persisted even after restarting COSMOS3 at the ASTE and Mitaka sites
-
&ref(20161024-0205.png,,25%);

- UT02:11 mac_sw REBOOT
-- We found dummy mode messages in the manager GUI -> ASTE-163

- UT02:18 aste16/ast0165/EAC2Up0.start
 az,el = -62 51
 daz,del = 0.0 0.0
 Tsys A[1,3] = [P0U,P1U] = 594.6 284.7
-- The flat spectra were gone!
-- A1's baseline levels were up and down.
-- A1's Tsys is a double of A3's Tsys.
-
&ref(20161024-0222a1.png,,25%); &ref(20161024-0222a3.png,,25%);

- loatt_dash345 -p0 287
-- Baseline stability looked to be improved

- UT02:39 aste16/ast0165/EAC2Up0.tune
- UT02:40 aste16/ast0165/EAC2Up0.start
 az,el = -67 47
 daz,del = 0.0 0.0
 Tsys A[1,3] = [P0U,P1U] = 443.2 294.0
 Peak Ta* A[1,3] = ~3.3 ~3.4
-
&ref(20161024-0243a1.png,,25%); &ref(20161024-0243a3.png,,25%);

- UT03:44 aste16/ast0165/EAC2Up0.tune
- UT03:45 aste16/ast0165/EAC2Up0.start
 az,el = -76 32
 daz,del = 0.0 0.0
 Tsys A[1,3] = [P0U,P1U] = 494.9 306.0
-
&ref(20161024-0351a1.png,,25%); &ref(20161024-0351a3.png,,25%);

*** 12CO(3-2) toward O Cet [#r8a1e233]

- UT04:24 aste16/ast0165/OCC2Up0.tune
- UT04:25 aste16/ast0165/OCC2Up0.start
-- 12CO(3-2) USB IF=5.8 MAC-HIGH
-- same tuning parameters as the previous EAC2Up0.start
-
 az,el = +10 70
 daz,del = 0.0 0.0
 Tsys A[1,3] = [P0U,P1U] = 366.6 254.8
-
&ref(20161024-0431a1.png,,25%); &ref(20161024-0431a3.png,,25%);
-
 az,el = +5 70
 daz,del = 0.0 +4.0
-
&ref(20161024-0433a1.png,,25%); &ref(20161024-0433a3.png,,25%);

- UT04:43 aste16/ast0165/OCC2Up0.tune
- UT04:43 aste16/ast0165/OCC2Up0.start
-- 12CO(3-2) USB IF=5.8
-- default tuning
-
 az,el = -4 70
 daz,del = 0.0 +4.0
 Tsys A[1,3] = 423.4 251.0
 Tsys A[1,3] = [P0U,P1U] = 423.4 251.0
-
&ref(20161024-0448a1.png,,25%); &ref(20161024-0448a3.png,,25%);

- UT04:54 aste16/ast0165/OCC2Up0.tune
- UT04:55 aste16/ast0165/OCC2Up0.start
-- 12CO(3-2) USB IF=5.8
-- loatt_dash345 -p0 287
-
 az,el = -13 69
 daz,del = 0.0 +4.0
 Tsys A[1,3] = 387.7 250.5
 Tsys A[1,3] = [P0U,P1U] = 387.7 250.5
-
&ref(20161024-0457a1.png,,25%); &ref(20161024-0457a3.png,,25%);

- UT05:03 aste16/ast0165/OCC2Up0.tune
- UT05:04 aste16/ast0165/OCC2Up0.start
-- 12CO(3-2) USB IF=5.8
-- loatt_dash345 -p0 297
-
 az,el = -19 69
 daz,del = 0.0 +4.0
 Tsys A[1,3] = 443.0 249.8
 Tsys A[1,3] = [P0U,P1U] = 443.0 249.8
-
&ref(20161024-0506a1.png,,25%); &ref(20161024-0506a3.png,,25%);

- UT05:28 aste16/ast0165/OCC2Up1.tune
- UT05:36 aste16/ast0165/OCC2Up1.tune
- UT05:37 aste16/ast0165/OCC2Up1.start
-- 12CO(3-2) USB IF=6.0 MAC-HIGH
-- default tuning parameters
-
 az,el = -39 65
 daz,del = 0.0 +4.0
 Tsys A[1,3] = 320.3 223.1
 Tsys A[1,3] = [P0U,P1U] = 320.3 223.1
-
 2016/10/24 05:42:43
  Temp. :  -3.26 C   Humid. : 12.16 % (  0.58 hPa )   Solar :  0.00 kW/m2
  Wind  :   2.31 m/s  298 deg   AirPressure : 572.04 hPa    ( Rain:  0.01 )
  Opacity @220 GHz :   0.0389
-
 Current time = 2016/10/24 05:42:45
 Aspirin time = 2016/10/24 05:42:43
 Weather time = 2016/10/24 05:42:31
 Aspirin Offset : (Az, El) = (   4.59,  -9.64 )
 Aspirin status : ** WIND ON ** ( C22:on  C6:OFF WIND:on )
 Refraction Corr. status : OK
-- Unstability could not be seen ...
-
&ref(20161024-0541a1.png,,25%); &ref(20161024-0541a3.png,,25%);

*** 12CO(3-2) toward Orion KL [#cb8fdf06]

- UT06:04 aste16/ast0165/OKC2Up1.tune
- UT06:05 aste16/ast0165/OKC2Up1.start
-- 12CO(3-2) USB IF=6.0 MAC-HIGH
-- Same tuning parameters
-- MAC-HIGH was used by mistake

- UT06:10 aste16/ast0165/OKC2Up1.tune
- UT06:11 aste16/ast0165/OKC2Up1.start
-- 12CO(3-2) USB IF=6.0 MAC-WIDE
-- Same tuning parameters
-
 az,el = 58 60
 daz,del = 0.0 +4.0
 Tsys A[1,3] = 353 243
 Tsys A[1,3] = [P0U,P1U] = 353 243
-
&ref(20161024-0615.png,,25%);

*** 13CO(3-2) toward Orion-KL [#b61ee966]

- UT06:48 aste16/ast0165/OKC3Lp1.tune
-- 13CO(3-2) LSB IF=6.0 MAC-WIDE
-- default tuning parameters

- UT06:54 aste16/ast0165/OKC3Lp1.tune
- UT06:56 aste16/ast0165/OKC3Lp1.start
-- 13CO(3-2) LSB IF=6.0 MAC-WIDE
-
 az,el = 40 68
 daz,del = 0.0 +4.0
 Tsys A[1,3] = 233 415
-
&ref(20161024-0700.png,,25%);
&ref(20161024-0703.png,,25%);
-- A spike at ~120km/s in A1 and NOT not in A3
-
&ref(20161024-0706.png,,25%);
&ref(20161024-0719.png,,25%);
-- The spike at ~120km/s was common to A1 and A2, which came from IF#1
-- The frequency of the spike was about 330.45 GHz

- UT07:19 aste16/aste0165/OKC3Lp2.tune
- UT07:20 aste16/aste0165/OKC3Lp2.start
-- 13CO(3-2) LSB IF=5.95 (2nd LO=8250) MAC-WIDE
-- default tuning parameters
-
 az,el = 15 72
 daz,del = 0.0 0.0
 Tsys A[1-4] = 246 275 424 429
-
&ref(20161024-0735.png,,25%);
-- Since the spike moved by ~-50 MHz, we considered that it came from signal sideband after the 1st downconversion by LO.
-- One possible explanation is that there is a spurious signal in the IF #1 and its amplitude depends on cancellation by on-off switching. We need to take a look at raw data before the switching.

- UT08:03 aste16/aste0165/OKC3Lp3.tune
- UT08:04 aste16/aste0165/OKC3Lp3.start
-- 13CO(3-2) LSB IF=5.95 (2nLO=8300->shifted center frequency by 50MHz) MAC-WIDE
-- default tuning parameters
-
 az,el = -10 72
 daz,del = 0.0 +4.0
 Tsys A[1-4] = 255 281 438 491
-
&ref(20161024-0806.png,,25%);

- UT08:27 aste16/aste0165/OCC2Up0.tune
-- Confirm the update of loatt_dash345.conf
-
 [astecntl@aste-1c ~]$ ls -l /home/astedev/frontend/loatt_ctl/loatt_dash345.conf
 lrwxrwxrwx 1 astedev astctl 25 Oct 24 08:26 /home/astedev/frontend/loatt_ctl/loatt_dash345.conf -> loatt_dash345.conf.161024
 [astecntl@aste-1c loatt_ctl]$ diff loatt_dash345.conf loatt_dash345.conf.150604 
 4,5c4,5
 < 338	285	300
 < 342	290	270
 ---
 > 338	275	300
 > 342	280	270
Diff of Observing Log/2016-10-24
