History of Observing Log/2016-10-24 (No. 3)

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  • 1 (2016-10-24 (Mon) 12:06:17)
  • 2 (2016-10-24 (Mon) 15:07:11)
  • 3 (2016-10-24 (Mon) 17:08:46)
  • 4 (2016-10-26 (Wed) 17:15:00)

Observing Log

ASTE-165 Investigation of unstable signals of DASH345†

12CO(3-2) toward EP Aqr†

• UT01:24 aste16/ast0165/EAC2Up0.tune
• tuning log will be put here

• UT01:36 LOST CONTROL PRIORITY just when scan monitor was launched...

  • envmon and asp-mon also wend away
  • Recovered by taking the control priority again

• UT01:39 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(): File not found: "20161024-0205.png" at page "Observing Log/2016-10-24";

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

• UT02:22 aste16/ast0165/EAC2Up0.start
  • The flat spectra were gone!
  • A1's baseline levels were up and down.
  • A1's Tsys is a double of A3's Tsys.
  &ref(): File not found: "20161024-0222a1.png" at page "Observing Log/2016-10-24"; &ref(): File not found: "20161024-0222a3.png" at page "Observing Log/2016-10-24";

• loatt_dash345 -p0 287
  • Stability looked to be improved

• UT02:40 aste16/ast0165/EAC2Up0.start

  Tsys 443.2 294.0
  Ta* ~3.3 ~3.4
  強度は同じくらい、Tsysは悪い。

• (screenshot-57.png)

• UT03:45 aste16/ast0165/EAC2Up0.start

  az,el = -76 32
  daz,del = 0.0 0.0
  Tsys A[1,3] = 494.9 306.0

  • (screenshot-58.png)

12CO(3-2) toward O Cet†

• UT04:25 aste16/ast0165/OCC2Up0.start
  • 12CO(3-2) USB IF=5.8

    az,el = +10 70
    Tsys A[1,3] = 366.6 254.8

  • same tuning parameters as the previous EAC2Up0.start
  • (screenshot-59.png)
  • (screenshot-60.png)

• UT04:44 aste16/ast0165/OCC2Up0.start
  • 12CO(3-2) USB IF=5.8

    az,el = -4 70
    Tsys A[1,3] = 423.4 251.0

  • default tuning
  • (screenshot-61.png)

• UT04:55 aste16/ast0165/OCC2Up0.start
  • 12CO(3-2) USB IF=5.8

    az,el = -13 69
    Tsys A[1,3] = 387.7 250.5

  • loatt_dash345 -p0 287
  • (screenshot-62.png)

• UT05:04 aste16/ast0165/OCC2Up0.start
  • 12CO(3-2) USB IF=5.8

    az,el = -19 69
    Tsys A[1,3] = 443.0 249.8

  • loatt_dash345 -p0 297
  • (screenshot-63.png)

• UT05:28 aste16/ast0165/OCC2Up1.start
  • 12CO(3-2) USB IF=6.0

  az,el = -39 65
  Tsys A[1,3] = 320.3 223.1

  • default parameters
  • Unstability could not be seen ...
  • (screenshot-64.png)

  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

12CO(3-2) toward Orion KL†

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

• UT06:12 aste16/ast0165/OKC2Up1.start
  • 12CO(3-2) USB IF=6.0
  • Same tuning parameters
  • Modified for MAC-WIDE

  az,el = 58 60
  Tsys A[1,3] = 353 243

  • (screenshot-65.png)

13CO(3-2) toward Orion-KL†

• UT06:47 aste16/ast0165/OKC3Lp1.tune
  • 13CO(3-2) LSB IF=6.0 MAC-WIDE
  • default tuning

• UT06:55 aste16/ast0165/OKC3Lp1.start
  • 13CO(3-2) LSB IF=6.0 MAC-WIDE
  • (screenshot-66.png) spike at ~120km/s of A1 not A3
  • (screenshot-67.png) spike at ~120km/s of A1 not A3
  • (screenshot-68.png) spike at ~120km/s -> common to A1 and A2 -> not MAC issue
  • freq ~330.45 GHz -> ?
  • (screenshot-69.png)

• UT07:19 aste16/aste0165/OKC3Lp2.tune
• UT07:20 aste16/aste0165/OKC3Lp2.start
  • 13CO(3-2) LSB IF=5.95 MAC-WIDE
  • no manual tuning
  • (screenshot-70.png)
  • Since the spike moved by ~-50 MHz, we considered that it came from signal sideband after the 1st downconversion.
  • IFにある程度強いスプリアスがいる??? -> on-offでそのキャンセル具合が変化している??? -> 生データを見る。

• 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
  • no manual tuning
  • (screenshot-72.png)