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This is an incomplete list of problems people have had while observing (actually it's a list of problems i've worked on and got around to documenting). 12dec05: 9 level wapp pulsar folding is doing the 9 level correction incorrectly. 17apr05 sband bistatic radar run had pointing problems. 31jan05: single Pol/channel setups for spectral line wapp observing only provides 1 polarization. 02aug04: ripples in lbw around 1390,1400 Mhz. seen a1861(may04), p1914(aug04) . ...

... A similar level of effort is anticipated for HDF-S. We are maintaining a `clearinghouse' for supporting and follow-up observations of the HDF-S. Test observations of the HDF-S field were obtained in October, 1997. ... Simultaneous, parallel observations were made with the three HST instruments STIS, WFPC2 and NICMOS of separate, neighboring fields. ... Additional flanking field observations were made surrounding the deep STIS, WFPC2 and NICMOS fields. ... The red field is the main HDF-S WFPC2 field....

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... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

... The file contains median maps, noise maps and an offset correction table used in low energy noise reduction of the PN. ... NOISE_MAP_INDEX . An index which gives the name of the extension containing the correct noise map for a given mode, ccd and rawx value. Attributes: . ... The noise map for ccd nn and mode mm, consisting of a single image. ... The median map for ccd nn and mode mm, consisting of a single image. ... Master offset map for ccd nn and mode mm, consisting of a single image. ...

... The first step to improve the FORS calibration is therefore to obtain data to allow a computation of the illumination correction across the field. ... Another limitation on the calibration accuracy has been the brightness of the Landolt standards which have forced the use of extremely short exposures introducing small but non-negligible shutter-time errors and also resulting in a very small number of useful standards per frame. ...

The problem of solar wind data correlation for the observations onboard several spacecraft is very important for three points of view: . ... This problem is studied now in detail by systematic determination of ion flux and ion velocity data correlations by INTERBALL-1 (IKI group), WIND and IMP 8 (both - MIT group). ... Solar wind plasma correlation lengths from IMP 8, WIND and INTERBALL-1. ... Correlation of solar wind observations onboard several spacecraft: INTERBALL-1, IMP 8 and WIND data. ...