Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.atnf.csiro.au/computing/software/miriad/doc/qvack.html
Дата изменения: Unknown Дата индексирования: Sun Apr 10 19:46:12 2016 Кодировка: Поисковые слова: m 8 |
Task: qvack Purpose: Flag after change to observing setup Categories: calibration Qvack is a Miriad task to flag data for a number of integrations near an observing setup change. For example, this is used to flag data that is suspect because the instrument had not settled correctly after the change in the setup. The visibility data are should to be in time order. Key: vis Input visibility data file. No default. Key: select Standard uv data selection. Default is to select all data. Key: interval This gives the time interval, in minutes, for which the data are flagged after a setup change (or before a setup change, if its value is negative). The default is 0.1, which flags for the first 6 seconds after a switch. Key: force The time interval, in minutes, which indicates the amount of time that should ellapse before forcing a (virtual) setup change. Thus you can QVACK on data that has distinct scans but no actual change in observing setup. Note that this means the first INTERVAL amount of data is always flagged. The MODE option is not needed, nor is it used if you set FORCE Defaults to no forced setup change. Key: options Extra processing options. Currently only one exists: anticipate Normally the interval given by the "interval" keyword is relative to the time of the first data found with a new setup. options=anticipate makes it relative to the time of the last data before a setup change occurs. Key: mode This determines what changes in setup cause flagging. Several values can be given, separated by commas, and minimum match is used. Possible values are: frequency A change in the frequency setup. Do not use this option if Doppler tracking is used. source A change in the source observed. mosaic A change in the observing centre of a mosaiced observation.