The Cycle 11 calibration program will be defined a few months after the Phase II deadline for approved programs. ... In special situations it is possible that observers may find the STScI calibration programs do not meet their needs. ... In these cases observers may propose to obtain their own calibration data. ... During Cycles 9 and 10, two WFPC2 Calibration Outsource programs were awarded. ... Results of both programs will be disseminated via the WFPC2 WWW site, as results become available. ...

Next: Self-Calibrating with Multiple Models Up: Computation Previous: Computation . Both selfcal and gpscal produce antenna gain tables in the same format as the calibration tasks previously described. ... Finally, if the primary gains have appreciable XY phase (for any antenna for selfcal , but for the reference antenna only for gpscal ), or significant amplitude gain mismatches (for selfcal only) then these corrections should be applied to the data before self-calibration. ...

... The routine processing of STIS data in the calibration ``pipeline" requires an interrelated set of software tasks and databases developed and maintained by many groups at STScI. We present the systems-level design of this calibration pipeline from the perspective of the STIS instrument group at STScI. We describe the multiple interfaces to the pipeline processes that the STIS group works across in an effort to provide for the routine calibration of STIS data. ... For example, the STIS group: . ...

... In , the visibility amplitudes and phases of the program stars are calibrated using calibrator stars, for which those variables are modeled and the resulting model coefficients transferred to the program star data. ... When calibrating the data, the user should begin by looking at the calibrated and normalized amplitudes first to see whether the data has already been calibrated (for example when a .cha file was read). ... In the case of visibility phases, there are no normalized quantities.) ...

... A data set contains a science frame, all its associated raw calibration frames and the master calibration frames created by combining and processing the raw calibration frames. ... Either one creates a MIDAS catalogue which contains the names of all single calibration frames to be combined in to the master frame, or, in the case of pipe line reduction, one use the Association Table. ... The names of single calibration frames are however also available in the Association Table. ...

... the alfa calibration results (.ps) ( .pdf ): . the pointing error vs rotation angle offset (.ps) ( .pdf ): . ... Comparing the two lets you separate out the alfa installation errors with general telescope pointing problems (from the beam repair). ... Part of the pointing error could come from the alfa rotation angle being off. ... Compute the change in the pointing error if the alfa rotation error was off by -5 to +5 degrees in .1 degree steps. ... Top: rms pointing error vs rotation angle offset. ...

Next: The STScI NICMOS Calibration Up: No Title Previous: CONICA: The high resolution . The STScI NICMOS Calibration Pipeline . Introduction . ... Dark Current Subtraction . ... Input Data . ... Scalar Background Subtraction . 2-D Background Subtraction . ... Status and Goals of the NICMOS Calibration Plan . ... Photometry . ... Photometric Performance of NICMOS . ... NICMOS Photometry. ... ST-ECF Grism Spectrum Software for NICMOS Grism Data . ... Analysis . ... STScI NICMOS Software . ...

... Class . ... Packages that use Calibration . ... TextEncoder ( ImageProcessor ip, Calibration cal, int precision) . Constructs a TextEncoder from an ImageProcessor and optional Calibration. ... ImageStatistics. getStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ... ByteStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ... ColorStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ... FloatStatistics ( ImageProcessor ip, int mOptions, Calibration cal) . ...

... Phase Correction Algorithms | ... This page describes work undertaken at the Cavendish Astrophysics Group , developing phase correction algorithms and software for the Atacama Large Millimetre Array (ALMA). Without correction, phase fluctuations, mainly arising from the water content of the atmosphere, would limit ALMA's performance . ... The following people are currently involved in the phase calibration workpackage, based at the Cavendish Astrophysics Group in the University of Cambridge : . ...

Next: Vignetting correction Up: Spatial Analysis Previous: *imcontour* - Iso-intensity contour . In order to perform detailed analysis on an x-ray field, a user will need to access the various calibration files, apply corrections for vignetting and propagate errors. Vignetting correction . makevig, vigdata* - Apply Vignetting Correction to an image . ... Background Corrections . imcalc* - Obtain a background subtracted image for ROSAT PSPC Data . ... To Resample Calibration Images . ...