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#acl RainerMauersberger:read,write,admin WalterBrunswig:read,write SantiagoNavarro:read,write DavidJohn:read,write JuanPenalver:read,write SalvadorSanchez:read,write ManuelRuiz:read,write NuriaMarcelino:read,write HansUngerechts:read,write SergioMartin:read,write AlbrecthSievers:read,write AxelWeiss:read,write FredericDamour:read,write GabrielPaubert:read,write montalba:admin,read,write VictorEspigares:admin,read,write All:read
##language:en
#language:en
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{{attachment:30m_es.jpg}}
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= Telescope System Status Wiki = The following pages are currently under our wiki system at [[http://www.iram.es|www.iram.es]]:
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under development, RMM 2005/03/30


{{{
(Date 2004-12-01)
 

== System - General ==

NORMAL OPERATION

== Antenna ==

OK
 

== Wobbler ==

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)

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

== Pointing Model ==

heterodyn: OK (last model update: 2004-11-17 ).
bolometer: OK (last model update: 2004-11-02 ).

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)
 

== 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.
New scaling factor of 1.0 has been implemented into obs.
Obs Tcold should be ok (2004-01-17)

== Pointing and Flux monitoring with SIS receivers: ==

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:

    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)


== 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.

== Bolometers ==

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

== Backends ==

 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)

== Computer/Software ==

Mirroring between IRAM Grenoble ( http://www.iram.fr ) and Granada( http://www.iram.es/ ) websites sometimes takes several days to update. (2003-07-01)

== Other Items ==

OK

Back to top

== Udates/History (in reverse order by date!): ==

    2004-12-01 AW
    2004-07-24 RM
    2004-03-24, 25 HU
    2004-01-17 AW
    2003-11-12 HU
    2003-09-25 MR
    2003-09-08 HU
    2003-08-20 HU
    2003-08-05 AS
    2003-07-09 RM
    2003-07-01,04/5, 7 HU
    2003-06-08, 09 HU
    2003-04-22, 26 HU
    2003-04-06 AS
    2003-03-31 HU
    2003-03-20 RM
    2003-02-11 AW
    2003-01-10, 2003-01-17, 2003-02-05 RM
    2003-01-14 TG
    2003-01-03, 06 HU
    2002-12-31 HU
    2002-12-21, 22 HU
    2002-12-19 RM
    2002-12-13, 14, 15, 16 HU
    2002-12-11 RM
    2002-12-05 TG
    2002-11-27 RM
    2002-11-05 AW
    2002-10-18 DJ
    2002-10-15 DJ
    2002-10-09, 12, 14 HU
    2002-10-08 AW
    2002-09-27 TG
    2002-09-26 DJ
    2002-09-23 AW
    2002-09-11/12, 17 HU
    ... (?)
    2002-08-07,10 HU
    2002-07-22 DJ
    ... (?)
    2002-07-16 HU
    ... (?)

Created by R. Mauersberger, June 18th, 2002

}}}

The rest of the page is the original Front Page and can be deleted in the near future.

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