0000282: Sometimes no correlated data from RT8 XY due to strange pointing behaviour.
All Projects | CNI | DZB | equalizer | IVC/ADC | LFFE | MFFE | Puma | Puma 2 | RFI | RT | submission | system time | Tadu | Time/LO | TMS | VLBI

Main | My View | View Issues | Change Log | Docs
  

Viewing Issue Simple Details [ Jump to Notes ] [ Issue History ] [ Print ]
ID Category Severity Reproducibility Date Submitted Last Update
0000282 [MFFE] 0.unknown/unspecified major sometimes 09-07-10 13:33 20-07-10 09:19
Reporter Geert Kuper View Status public  
Assigned To Jan Pieter de Reijer
Priority normal Resolution open  
Status resolved  
Summary 0000282: Sometimes no correlated data from RT8 XY due to strange pointing behaviour.
Description Concerns : Pointing behaviour RT 8
 
Sometimes all interferometers with RT8 give an amplitude which is much
too low (about 10 % at Lband).
This is not caused by an error in the MFFE, but by an extremely large
Pointing error in Declination.
 
The size of that error has not been found yet, but is at least in the
order of a degree.
It is not possible to determine this error with a Pointing observation
because the top intensity falls outside the Pointing square.
 
It is rather unpredictable when the eror occurs, but if it doesn't
occur the pointing is excellent and its data is good, and if it does
occur its data is useless.
 
Hans vSG
Additional Information 20100720:
RT8 works fine after the problem of the Dec. encoder had been solved yesterday afternoon.
MFFE 06
RT 8
MFFE-band 5cm
polarisation X, Y
sky frequency (MHz) 5004
Attached Files

- Relationships

There are no notes attached to this issue.

- Issue History
Date Modified Username Field Change
09-07-10 13:33 Geert Kuper New Issue
09-07-10 13:33 Geert Kuper MFFE  => 06
09-07-10 13:33 Geert Kuper RT  => 8
09-07-10 13:33 Geert Kuper MFFE-band  => 5cm
09-07-10 13:33 Geert Kuper polarisation  => X, Y
09-07-10 13:33 Geert Kuper sky frequency (MHz)  => 5004
09-07-10 13:36 Geert Kuper Assigned To  => Harm-Jan Stiepel
09-07-10 13:36 Geert Kuper Status new => assigned
16-07-10 07:58 Geert Kuper Assigned To Harm-Jan Stiepel => Jan Pieter de Reijer
16-07-10 07:58 Geert Kuper Summary Sometimes no correlated data from RT8 XY 6cm MFFE-06 => Sometimes no correlated data from RT8 XY due to strange pointing behaviour.
16-07-10 07:58 Geert Kuper Description Updated
20-07-10 09:19 Yuan Tang Status assigned => resolved
20-07-10 09:19 Yuan Tang Additional Information Updated