Diff for "TelescopeSystemStatus" - www.iram.es Main Wiki

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TableOfContents(3)

System - General

NORMAL OPERATION

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Antenna

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Wobbler

$/!\$ Observing configuration sometimes is not transfered to the wobbler control system and when fails W. Brunswig has to restart his communication programs (since January 2005). Wobbler config. can be set manually by operator

Wobbler rotation implemented. Current range: +/- 60deg (2004-12-01 AW)

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Pointing Model

heterodyne: OK (last model update: 2005-04-30 ).BR bolometer: OK (last model update: 2004-11-02 ).

$/!\$ Operator/AOD: Check regularly that automatic P4 P5 is working (2002-12-13).BR Narrowband continuum pointing (for SiO masers) is out of service! (2003-07-09, 2003-07-30)

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SIS Receivers

A, B, C and D receivers are aligned within 3", checked (2003-09-24)

Calibration Tcold temperatures have been checked by receiver group.BR New scaling factor of 0.94 has been implemented into obs.BR Obs Tcold should be ok (2005-06-28)

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Pointing and Flux monitoring with SIS receivers:

Continuum instability ("ripple") can occur with all receivers, making pointing and focusing difficult.

In general some receivers are better then others in this respect as summarized here:
- A100 generally OK for pointing. (2003-11-12) BR B100 OK, is best for pointing BR $/!\$ C150 often bad for pointing, ripple. (2002-07-16) BR D150 generally good performance for pointing.(2002-07-16) BR $/!\$ A230 often unstable, bad for pointing and flux monitoring. (2003-11-12) BR B230 OK BR $/!\$ C270 very bad for pointing at 265 Ghz. (2002-07-16) BR $/!\$ D270 can be unstable and difficult for pointing. (2002-07-16) BR HERA pointing difficulties using beam switch mode - total power mode gave better results but requires excellent weather

BR Wobbler switching may avoid ripple, beamswitching is most sensitive to ripple

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HERA

Second polarization installed. $/!\$ One blind pixel. BR SSB tuning tables for standard frequencies. BR Sideband rejections not determined (2004-12-01 AW) BR

$/!\$ Watch the computer control of the derotator closely (2002-12-22). BR $/!\$ Make sure the derotator tracking is stopped after observations, i.e, set to zero degrees in "frame". BR $/!\$ With VESPA, the maximum of 4 spectra per pixel can be used. BR $/!\$ $/!\$ Much higher noise in HERA 2 than HERA 1 when using Vespa. This is being investigated by S. Navarro [RM 30.6.2005]BR $/!\$ When using HERA 1 and 2 configure only 1 Channel for continuum observations in OBS, never-the-less the continuum drifts of all channels are reduced (calibrated) by ODP [AS 11.10.2005]

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Bolometers

Mambo II is installed and ready for operation (AW 2004-12-01)

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Backends

256 MHz shift in 100kHz FB header (AW 2004-12-01) BR Software and/or hardware problem in the 1MHz FB - problem is currently investigated (AW 2004-12-01) BR Spikes in VESPA at intersection of different units (AW 2004-12-01) BR

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Computer/Software

IRAMEF ot of order (End of Sept 2005)

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Other Items

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Updates/History

To see the changes between the actual and the last version, please see Show Changes in the Wiki Interface. If you want to see the Revision History of this page, please see Get Info in the Wiki Interface.

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Legend

: OKBR $/!\$ : WarningBR : ErrorBR

The wiki markup of these icons is:

{{{(./) : OK $/!\$ : Warning : Error }}}

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-  ⇤ ← Revision 1 as of 2005-04-21 16:25:33 → 
  Size: 4572
  Editor: gra-lx8
  Comment:
+   ← Revision 23 as of 2005-10-11 14:19:27 → ⇥
  Size: 4668
  Editor: AlbrechtSievers
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
+#acl RainerMauersberger:read,write WalterBrunswig:read,write SantiagoNavarro:read,write DavidJohn:read,write JuanPenalver:read,write SalvadorSanchez:read,write ManuelRuiz:read,write FernandoAnel:read,write MarianoEspinosa:read,write EnriqueLobato:read,write DavidMartinez:read,write  JuanLuisSantaren:read,write NuriaMarcelino:read,write HansUngerechts:read,write SergioMartin:read,write AlbrechtSievers:read,write AxelWeiss:read,write FredericDamour:read,write GabrielPaubert:read,write KarlSchuster:read,write RosaMontalban:admin,read,write VictorEspigares:admin,read,write All:read
##language:en
#pragma section-numbers off
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+Line 6:
-= Telescope System Status =
-Line 5:
+Line 7:
-''(Date 2004-12-01)''
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-NORMAL OPERATION
+(./) NORMAL OPERATION
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-OK
+(./) OK
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-Avoid wobbler throw of 120"; with a throw of 120" the specification of a phase time may not work properly.  With a throw of 119 or 121 is should be OK. (2003-07-09)
Results from first pointing after unlocking the wobbler can be  wrong! Usually it's sufficient to ignore the first pointing and repeat the pointing (2003-07-09)
+/!\ Observing configuration sometimes is not transfered to the wobbler control system and when fails W. Brunswig has to restart his communication programs (since January 2005). Wobbler config. can be set manually by operator
-Line 33:
+Line 32:
-heterodyn: OK (last model update: 2004-11-17 ).
+heterodyne: OK (last model update: 2005-04-30 ).[[BR]]
-Line 36:
+Line 35:
-Operator/AOD: Check regularly that automatic P4 P5  is working (2002-12-13).
Narrowband continuum pointing (for SiO masers) is out of service! (2003-07-09, 2003-07-30)
+/!\ Operator/AOD: Check regularly that automatic P4 P5  is working (2002-12-13).[[BR]]
{X} Narrowband continuum pointing (for SiO masers) is out of service! (2003-07-09, 2003-07-30)
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-Calibration Tcold temperatures have been checked by receiver group.
New scaling factor of 1.0 has been implemented into obs.
Obs Tcold should be ok (2004-01-17)
+Calibration Tcold temperatures have been checked by receiver group.[[BR]]
New scaling factor of 0.94 has been implemented into obs.[[BR]]
Obs Tcold should be ok (2005-06-28)
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-Continuum instability ("ripple") can occur with all receivers, making pointing and focussing difficult.
+Continuum instability ("ripple") can occur with all receivers, making pointing and focusing difficult.
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-    A100 generally OK for pointing. (2003-11-12)
    B100 OK, will be replaced  (2003-11-12)
    C150 often bad for pointing, ripple. (2002-07-16) 
    D150 generally good performance for pointing.(2002-07-16)
    A230 often unstable, bad for pointing and flux monitoring. (2003-11-12) 
    B230 OK, will be replaced (2003-11-12)
    C270 very bad for pointing at 265 Ghz. (2002-07-16)
    D270 can be unstable and difficult for pointing. (2002-07-16)
    HERA pointing difficulties using beam switch mode - total power mode gave better results (2004-01-17)
+    A100 generally OK for pointing. (2003-11-12) [[BR]]
    B100 OK, is best for pointing [[BR]]
    /!\ C150 often bad for pointing, ripple. (2002-07-16) [[BR]]
    D150 generally good performance for pointing.(2002-07-16) [[BR]]
    /!\ A230 often unstable, bad for pointing and flux monitoring. (2003-11-12) [[BR]]
    B230 OK [[BR]]
    /!\ C270 very bad for pointing at 265 Ghz. (2002-07-16) [[BR]]
    /!\ D270 can be unstable and difficult for pointing. (2002-07-16) [[BR]]
    HERA pointing difficulties using beam switch mode - total power mode gave better results but requires excellent weather 
[[BR]] Wobbler switching may avoid ripple, beamswitching is most sensitive to ripple
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+Line 71:
-Second polarization installed. One blind pixel.
No SSB tuning tables except for few standard frequencies.
Sideband rejections not determined   (2004-12-01 AW)
+Second polarization installed. /!\ One blind pixel. [[BR]]
SSB tuning tables  for  standard frequencies. [[BR]]
Sideband rejections not determined   (2004-12-01 AW) [[BR]]
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+Line 76:
-Watch the computer control of the derotator closely (2002-12-22). 
Make sure the derotator tracking is stopped after observations, i.e, set to zero degrees in "frame".
With VESPA, only two spectra per pixel can be used.
+/!\ Watch the computer control of the derotator closely (2002-12-22). [[BR]]
/!\ Make sure the derotator tracking is stopped after observations, i.e, set to zero degrees in "frame". [[BR]]
/!\ With VESPA, the maximum of 4 spectra per pixel can be used. [[BR]]
/!\ /!\ Much higher noise in HERA 2 than HERA 1 when using Vespa. This is being investigated by S. Navarro [RM 30.6.2005][[BR]]
/!\ When using HERA 1 and 2 configure only 1 Channel for continuum observations in OBS, never-the-less the continuum drifts of all channels are reduced (calibrated) by ODP [AS 11.10.2005]
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+Line 92:
-MHz shift in 100kHz FB header (AW 2004-12-01)
 Software and/or hardware problem in the 1MHz FB  - problem is currently investigated (AW 2004-12-01)
 Spikes in VESPA at intersection of different units (AW 2004-12-01)
+MHz shift in 100kHz FB header (AW 2004-12-01) [[BR]]
 Software and/or hardware problem in the 1MHz FB  - problem is currently investigated (AW 2004-12-01) [[BR]]
 Spikes in VESPA at intersection of different units (AW 2004-12-01) [[BR]]
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+Line 100:
-Mirroring between IRAM Grenoble ( http://www.iram.fr ) and Granada( http://www.iram.es/ ) websites sometimes takes several days to update.   (2003-07-01)
+IRAMEF ot of order (End of Sept 2005)
-Line 110:
+Line 113:
-''(in reverse order by date!)''

    2004-12-01 AW [[BR]]
    2004-07-24 RM [[BR]]
    2004-03-24, 25 HU [[BR]]
    2004-01-17 AW [[BR]]
    2003-11-12 HU [[BR]]
    2003-09-25 MR [[BR]]
    2003-09-08 HU [[BR]]
    2003-08-20 HU [[BR]]
    2003-08-05 AS [[BR]]
    2003-07-09 RM [[BR]]
    2003-07-01,04/5, 7 HU [[BR]]
    2003-06-08, 09 HU [[BR]]
    2003-04-22, 26 HU [[BR]]
    2003-04-06 AS [[BR]]
    2003-03-31 HU [[BR]]
    2003-03-20 RM [[BR]]
    2003-02-11 AW [[BR]]
    2003-01-10, 2003-01-17, 2003-02-05 RM [[BR]] 
    2003-01-14 TG [[BR]]
    2003-01-03, 06 HU [[BR]]
    2002-12-31 HU [[BR]]
    2002-12-21, 22 HU [[BR]]
    2002-12-19 RM [[BR]]
    2002-12-13, 14, 15, 16 HU [[BR]]
    2002-12-11 RM [[BR]]
    2002-12-05  TG [[BR]]
    2002-11-27 RM [[BR]]
    2002-11-05 AW [[BR]]
    2002-10-18 DJ [[BR]]
    2002-10-15 DJ [[BR]]
    2002-10-09, 12, 14 HU [[BR]]
    2002-10-08 AW [[BR]]
    2002-09-27 TG [[BR]]
    2002-09-26 DJ [[BR]]
    2002-09-23 AW [[BR]] 
    2002-09-11/12, 17 HU [[BR]]
    ... (?) [[BR]]
    2002-08-07,10 HU [[BR]]
    2002-07-22 DJ [[BR]]
    ... (?) [[BR]]
    2002-07-16  HU [[BR]]
    ... (?) [[BR]][[BR]]
+To see the changes between the actual and the last version, please see '''''Show Changes''''' in the Wiki Interface. 
If you want to see the Revision History of this page, please see '''''Get Info''''' in the Wiki Interface.
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+Line 118:
-'''Created by R. Mauersberger, June 18th, 2002'''
+== Legend ==

(./) : OK[[BR]]
/!\ : Warning[[BR]]
{X} : Error[[BR]]


The wiki markup of these icons is:

{{{(./) : OK
/!\ : Warning
{X} : Error
}}}

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