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newfeed_athon_2018

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Table of Contents

ATA Feed-A-Thon June 20->25, 2018

doing the dishes…

Criteria

The basic health of a feed is currently determined by the phase rms as measured on the A and C correlators during a weekly “array health” correlator observation. Another indicator is the cryotemp.

phase rms: 

Command: ahcheck.py --attr prms-a,prms-c -a 2b,3l,2e,1e,2a,2m,1h,1k,2h,4j,2j,3d -f all --fmt csv 
 [0.00001,2.0],     #EXCELLENT
 [2.00001,5.0],     #GOOD
 [5.00001,10.0],    #MARGINAL
 [10.00001,300.0]   #POOR

cryotemp: 

Command: ahcheck.py --attr cryotemp -a 2b,3l,2e,1e,2a,2m,1h,1k,2h,4j,2j,3d  --fmt csv 
[0.0,59.99],     #TOO LOW
[60.0,65.0],     #EXCELLENT
[65.01,75.0],    #GOOD
[75.01,150.0],   #MARGINAL
[150.01,400.0]   #POOR

Antenna Feeds

The 16 new feeds are on antennas: 1c,1e,1g,1h,1k,2a,2b,2e,2h,2j,2m,3c,3d,3l,4j,5b

1e

  • Notes page
  • Install date: 2017-12-06
  • SN: 5C4-002
  • Noisy - wobbling bearing sound from behind vacuum box. Needs new diaphragm pump. Can be repaired on site by Minex.
  • Cryotemp: 66.3
pol prms-a_3c84-1430 prms-a_3c84-3040 prms-a_3c84-8400 prms-a_3c84-4500 prms-a_3c84-10000
x103.14315.80357.339865.1795821.57585.50036
y77.799818.4617.1886228.04779.075125.59803
pol prms-c_3c84-1430 prms-c_3c84-3040 prms-c_3c84-8400 prms-c_3c84-4500 prms-c_3c84-10000
x77.2130.013.03584.1037418.86615.30203
y118.5990.06.9952526.034912.75546.03039

1h

  • Notes page
  • Install date: 2017-06-14
  • SN: 5C4-013
  • NOTE: 1h is not hooked up to fxa
  • Cryotemp: 70.1
pol prms-c_3c84-1430 prms-c_3c84-3040 prms-c_3c84-8400 prms-c_3c84-4500 prms-c_3c84-10000
x80.33470.04.3150128.982714.45428.51354
y26.03670.07.0809114.98414.72825.39205

1k

  • Notes page
  • Install date: 2017-06-14
  • SN: 5C4-012
  • Cryotemp: 67.0
pol prms-a_3c84-1430 prms-a_3c84-3040 prms-a_3c84-8400 prms-a_3c84-4500 prms-a_3c84-10000
x17.90631.57395.8649814.072813.6758.49049
y24.207823.147810.09598.109728.04587.78466
pol prms-c_3c84-1430 prms-c_3c84-3040 prms-c_3c84-8400 prms-c_3c84-4500 prms-c_3c84-10000
x26.03670.07.0809114.98414.72825.39205
y24.28160.010.2187.123123.64473.52858

2a

  • Notes page
  • Install date: 2015-10-23
  • SN: 5C4-005
  • Cryotemp: 65.2
pol prms-a_3c84-1430 prms-a_3c84-3040 prms-a_3c84-8400 prms-a_3c84-4500 prms-a_3c84-10000
x0.8882530.8010411.66180.914624.115461.00492
y0.7359151.026371.377410.8061635.184631.40661
pol prms-c_3c84-1430 prms-c_3c84-3040 prms-c_3c84-8400 prms-c_3c84-4500 prms-c_3c84-10000
x0.7681680.01.795230.8976144.446610.720942
y1.392070.01.090830.8500484.125311.44136

2b

  • Notes page
  • Install date: 2016-01-28
  • SN: 5C4-010
  • NOTE: not hooked up to fxa
  • Cryotemp: 71.7
pol prms-c_3c84-1430 prms-c_3c84-3040 prms-c_3c84-8400 prms-c_3c84-4500 prms-c_3c84-10000
x0.9664760.02.520181.035946.265261.03503
y1.717750.01.810251.455085.763811.26734

2e

  • Notes page
  • Install date: 2015-10-23
  • SN: 5C4-004
  • NOTE: Not hooked up to fxc
  • Cryotemp: 70.0
pol prms-a_3c84-1430 prms-a_3c84-3040 prms-a_3c84-8400 prms-a_3c84-4500 prms-a_3c84-10000
x1.24780.8184882.591150.8413913.16771.37329
y1.154741.477121.272361.092868.889860.846827

2h

  • Notes page
  • Install date: 2016-01-28,
  • SN: 5C4-009
  • NOTE: Not hooked up to fxa
  • Cryotemp: 78.0
pol prms-c_3c84-1430 prms-c_3c84-3040 prms-c_3c84-8400 prms-c_3c84-4500 prms-c_3c84-10000
x63.83040.012.316915.383221.26689.50977
y26.74450.010.44126.6807416.37597.28545

2j

  • Notes page
  • Install date: 2017-06-13
  • SN: 5C4-014
  • Cryotemp: 69.0
pol prms-a_3c84-1430 prms-a_3c84-3040 prms-a_3c84-8400 prms-a_3c84-4500 prms-a_3c84-10000
x1.190251.4367913.19771.130520.70734.31894
y0.6769140.8594381.135291.008013.116041.60711
pol prms-c_3c84-1430 prms-c_3c84-3040 prms-c_3c84-8400 prms-c_3c84-4500 prms-c_3c84-10000
x1.119250.012.49691.075512.74322.93258
y2.874590.03.201773.394683.545413.2756

2m

  • Notes page
  • Install date: 2017-06-13
  • SN: 5C4-015
  • NOTE: Not hooked up to fxc
  • Cryotemp: 68.0
pol prms-a_3c84-1430 prms-a_3c84-3040 prms-a_3c84-8400 prms-a_3c84-4500 prms-a_3c84-10000
x29.394416.52126.211596.1404313.3536.18128
y20.063112.01895.4230517.929115.396111.6336

3d

  • Notes page
  • Install date: 2017-06-15
  • SN: 5C4-017
  • Cryotemp: 71.8
pol prms-a_3c84-1430 prms-a_3c84-3040 prms-a_3c84-8400 prms-a_3c84-4500 prms-a_3c84-10000
x20.38466.336394.634746.0323116.57322.57487
y38.374441.27356.2063114.535913.13677.54773
pol prms-c_3c84-1430 prms-c_3c84-3040 prms-c_3c84-8400 prms-c_3c84-4500 prms-c_3c84-10000
x24.94470.03.924398.6807615.154.31355
y28.99010.06.1623514.062510.23556.5478

3l

  • Notes page
  • Install date: 2015-12-16
  • SN: 5C4-011
  • Noisy - wobbling bearing sound from behind vacuum box. Needs new diaphragm pump. Can be repaired on site by Minex.
  • Cryotemp: 65.0
pol prms-a_3c84-1430 prms-a_3c84-3040 prms-a_3c84-8400 prms-a_3c84-4500 prms-a_3c84-10000
x1.081660.9219042.76581.5319.0731820.9275
y2.333560.8888971.436142.032075.845611.44779
pol prms-c_3c84-1430 prms-c_3c84-3040 prms-c_3c84-8400 prms-c_3c84-4500 prms-c_3c84-10000
x0.5958810.03.477391.764658.354242.09389
y6.280420.07.076212.9396439.22194.27988

4j

  • Notes page
  • Install date: 2017-12-06
  • SN: 5C4-006
  • Cryotemp: 65.0
pol prms-a_3c84-1430 prms-a_3c84-3040 prms-a_3c84-8400 prms-a_3c84-4500 prms-a_3c84-10000
x0.9964981.072744.331131.617756.28831.38271
y9.7149411.407312.85884.7743718.90445.42458
pol prms-c_3c84-1430 prms-c_3c84-3040 prms-c_3c84-8400 prms-c_3c84-4500 prms-c_3c84-10000
x1.689260.05.245111.670734.7971.35037
y0.7941740.04.18581.356034.946311.4622

New Feeds Not Operational

1c

  • Install date: 2015-10-23
  • SN: 5C4-007
  • STATUS: DOWN
  • 2017-09-25 sent back to Minex for repair: cryo cooler/pump unit still not working properly even after change

1g

  • Install date: 2015-12-16
  • SN: 5C4-008
  • STATUS: DOWN
  • 2017-12-19 (maint) iced over. 24h roughing pump did not clear. Feed turned off. Needs to be looked at by Minex Minex.

3c

  • Install date: 2017-06-13
  • SN: 5C4-016
  • STATUS: DOWN
  • 2018-02-07 Feed lost vacuum/shut off

5b

  • Install date: 2015-08-15
  • SN: 5C4-003
  • STATUS: DOWN
  • 2018-02-07 (maint) 24V ps died. Replaced. Roughing pump not coming up.
newfeed_athon_2018.1529615780.txt.gz · Last modified: 2023/10/28 18:36 (external edit)
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