Observation
my home upper gernal Observation ARO HHT ARO 12M ASTE CSO DeLingHa13 IRAM 30M KOSMA LSST Nobeyama 45M YNAO40m SESHAN25 Herschel

Caution!! Although I am happy to share my research notes below with all visitors to my webpages, these pages are mainly designed for my own use and subject to change without warning. I do not guarantee the correctness of all contents as well.

Observation issues

mm single dish observation

Focus check: You need to specify checking for single or dual sideband, because the USB and LSB have different frequencies and so slightly different focuses. For dual sideband observation, you need a compromise to achieve the best focuses at both sideband frequencies.
Pointing check: You need to specify checking for single or dual polarisation, because for some telescopes such as ARO10m, the two polarisation channels is misaligned a little and so they are looking at slight different directions on the sky. If you are doing dual polarisation observation, you'd better achieve a compromise to minimise the pointing error in both polarisation channels.
 

 [ previous ] [ upper ] [ next ] Welcome comments to me: jinhuaheynao.ac.cn [back to my Home]