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#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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= Telescope System Status =
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''(Date 2004-12-01)''
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NORMAL OPERATION /!\ The 30-m telescope is now operating using the New Control System (NCS) (2005-11-30 HU)

 [http://www.iram.es/IRAMES/ncs30m/ NCS documentation]

 [http://mrt-lx1/mainWiki/ Wiki with up-to-date Notes on NCS]


NCS supports only source coordinates in Equatorial J2000.0 system.
(More systems will be made available as soon as possible)

Observations near and towards the Sun are not yet supported.

NCS supports observing modes and source offsets in:
 * Projection "Radio" (same offsets as in old CS) in Equatorial J2000.0
 * "true angle" horizontal
 * Nasmyth (receiver offsets)


All 4 Switching Modes are supported by the NCS (total power, beam switching, wobbler switching, frequency switching.) Observations with "rotated" wobbler are not yet possible.

Observing modes supported by the NCS:

 * Calibrate (for heterodyne)
 * Pointing
 * Focus
 * Tip
 * Track (Frequency Switching)
 * ON-OFF (Position Switching or Wobbler Switching)
 * On-The-Fly Map
 * VLBI

(./) Automatic calibration and processing of heterodyne data using the MIRA software is in operation for most observing modes. MIRA can also be used manually and offline.
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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)		 Available under NCS.
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Wobbler rotation implemented. Current range: +/- 60deg (2004-12-01 AW) /!\ Wobbler rotation (actually, secondary rotation) not yet available under NCS.
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heterodyn: OK (last model update: 2004-11-17 ).
bolometer: OK (last model update: 2004-11-02 ).		 heterodyne: OK, (last model update: 2006-01-30 15:16).
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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)		 bolometer: OK, (last model update: 2006-02-09 08:35).

/!\ Pointing on spectral line sources like SiO masers is not yet supported by the data processing.
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A, B, C and D receivers are aligned within 3", checked (2003-09-24) (./) A, B, C, D receivers are supported by NCS for observations.
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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)		 /!\ Some problems reported from B100: difficult to lock/tune at some frequencies, higher Trx, ...

(./) Image/Signal gain-ratio calibration is supported by NCS.

(./) Standard table of T_cold calibration temperatures (same as in old CS) for A, B, C, D receivers is implemented in NCS; note that this covers only a limited standard range of frequencies. /!\ Outside this range, T_cold has to be set manually.

/!\ Receiver C150 shows low continuum signal at the higher frequencies (>168 GHz). It has to be fully checked. Use D150 instead. (2005-11-16)

[#beginOfPage Back to top]

== HERA ==

(./) HERA is supported by the NCS. (2006-02 HU)

Second polarization installed. [[BR]]
(./) One previously blind pixel is now fixed (2006-04). [[BR]]
SSB tuning tables for standard frequencies. [[BR]]
Sideband rejections not determined (2004-12-01 AW). Use standard value of 0.1! [[BR]]

(./) For HERA calibration, measured values of the load temperatues are automatically 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]]
/!\ Much higher noise in HERA 2 than HERA 1 when using Vespa. This is being investigated by S. Navarro [RM 30.6.2005][[BR]]
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Continuum instability ("ripple") can occur with all receivers, making pointing and focussing difficult.
 In general some receivers are better then others in this respect as summarized here:		 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)		 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]]
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== HERA ==

Second polarization installed. One blind pixel.
No SSB tuning tables except for few standard frequencies.
Sideband rejections not determined (2004-12-01 AW)


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.

[#beginOfPage Back to top]
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Mambo II is installed and ready for operation (AW 2004-12-01) (./) Bolometer Observations are supported by the NCS.
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 256 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)		 Support by NCS:

 * (./) Continuum Backends for heterodyne receivers
 * (./) 4 MHz Filterbanks
 * (./) 1 MHz Filterbank in parts of 256, 512, 768, or 1024 channels
 * (./) 100 kHz Filterbank ''only'' for receivers in "narrow" mode (this includes A100 and B100)
 * (./) WILMA is supported by NCS for observations with HERA (2006-02 HU)
 * (./) VESPA
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Mirroring between IRAM Grenoble ( http://www.iram.fr ) and Granada( http://www.iram.es/ ) websites sometimes takes several days to update. (2003-07-01) /!\ The 30-m telescope is now operating using the New Control System (NCS) (2005-11-30 HU). Note that the NCS supports most essential features, but still has some limitaions!
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OK  * /!\ Remote observing is not yet possible with the NCS
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''(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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'''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
}}}

[#beginOfPage Back to top]

Anchor(beginOfPage)

TableOfContents(3)

System - General

/!\ The 30-m telescope is now operating using the New Control System (NCS) (2005-11-30 HU)

NCS supports only source coordinates in Equatorial J2000.0 system. (More systems will be made available as soon as possible)

Observations near and towards the Sun are not yet supported.

NCS supports observing modes and source offsets in:

  • Projection "Radio" (same offsets as in old CS) in Equatorial J2000.0
  • "true angle" horizontal
  • Nasmyth (receiver offsets)

All 4 Switching Modes are supported by the NCS (total power, beam switching, wobbler switching, frequency switching.) Observations with "rotated" wobbler are not yet possible.

Observing modes supported by the NCS:

  • Calibrate (for heterodyne)
  • Pointing
  • Focus
  • Tip
  • Track (Frequency Switching)
  • ON-OFF (Position Switching or Wobbler Switching)
  • On-The-Fly Map
  • VLBI

(./) Automatic calibration and processing of heterodyne data using the MIRA software is in operation for most observing modes. MIRA can also be used manually and offline.

[#beginOfPage Back to top]

Antenna

(./) OK

[#beginOfPage Back to top]

Wobbler

Available under NCS.

/!\ Wobbler rotation (actually, secondary rotation) not yet available under NCS.

[#beginOfPage Back to top]

Pointing Model

heterodyne: OK, (last model update: 2006-01-30 15:16).

bolometer: OK, (last model update: 2006-02-09 08:35).

/!\ Pointing on spectral line sources like SiO masers is not yet supported by the data processing.

[#beginOfPage Back to top]

SIS Receivers

(./) A, B, C, D receivers are supported by NCS for observations.

/!\ Some problems reported from B100: difficult to lock/tune at some frequencies, higher Trx, ...

(./) Image/Signal gain-ratio calibration is supported by NCS.

(./) Standard table of T_cold calibration temperatures (same as in old CS) for A, B, C, D receivers is implemented in NCS; note that this covers only a limited standard range of frequencies. /!\ Outside this range, T_cold has to be set manually.

/!\ Receiver C150 shows low continuum signal at the higher frequencies (>168 GHz). It has to be fully checked. Use D150 instead. (2005-11-16)

[#beginOfPage Back to top]

HERA

(./) HERA is supported by the NCS. (2006-02 HU)

Second polarization installed. BR (./) One previously blind pixel is now fixed (2006-04). BR SSB tuning tables for standard frequencies. BR Sideband rejections not determined (2004-12-01 AW). Use standard value of 0.1! BR

(./) For HERA calibration, measured values of the load temperatues are automatically 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 /!\ Much higher noise in HERA 2 than HERA 1 when using Vespa. This is being investigated by S. Navarro [RM 30.6.2005]BR

[#beginOfPage Back to top]

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

[#beginOfPage Back to top]

Bolometers

(./) Bolometer Observations are supported by the NCS.

[#beginOfPage Back to top]

Backends

Support by NCS:

  • (./) Continuum Backends for heterodyne receivers

  • (./) 4 MHz Filterbanks

  • (./) 1 MHz Filterbank in parts of 256, 512, 768, or 1024 channels

  • (./) 100 kHz Filterbank only for receivers in "narrow" mode (this includes A100 and B100)

  • (./) WILMA is supported by NCS for observations with HERA (2006-02 HU)

  • (./) VESPA

[#beginOfPage Back to top]

Computer/Software

/!\ The 30-m telescope is now operating using the New Control System (NCS) (2005-11-30 HU). Note that the NCS supports most essential features, but still has some limitaions!

[#beginOfPage Back to top]

Other Items

  • /!\ Remote observing is not yet possible with the NCS

[#beginOfPage Back to top]

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.

[#beginOfPage Back to top]

Legend

(./) : OKBR /!\ : WarningBR {X} : ErrorBR

The wiki markup of these icons is:

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

[#beginOfPage Back to top]

TelescopeSystemStatus (last edited 2025-01-25 17:12:49 by msanchez)