Plan GBT mapping

On-the-fly mapping with the GBT is done by driving the telescope along one coordinate axis to scan one stripe, then step in the orthogonal direction for the next stripe. The procedures are named "RALongMap" (scanning in the RA or longitude direction), or "DecLatMap" (scanning in the Dec or latitude direction).

One needs to specify the telescope scanning rate ("Xrate"), stripe spacing, and number of stripes. This calculator figures out these things for you, and also estimates the total time required to do the map, given the desired integration time per pixel, number of pixels per beam, and total size of the area to be mapped.

Receiver Obs.Freq. Integration per pixel Pixels per beam Map: X width Map: Y width
GHz sec arcmin arcmin

Note that if you set Obs.Freq. to zero, the default frequency will be used for the selected receiver. Otherwise, the specified Obs.Freq. will be used, regardless of the choice of receiver.