User Tools

Site Tools


lbaops:lbacalibrationnotes

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
lbaops:lbacalibrationnotes [2015/12/18 16:38]
127.0.0.1 external edit
lbaops:lbacalibrationnotes [2016/01/05 13:00] (current)
cormac
Line 5: Line 5:
 However, amplitude calibration of LBA data often requires special treatment, as measurements of system temperature (Tsys) and other calibration data may not be available for all telescopes. However, amplitude calibration of LBA data often requires special treatment, as measurements of system temperature (Tsys) and other calibration data may not be available for all telescopes.
  
-Unfortunately,​ calibration of VLBI data is not as simple as calibration of data from a compact interferometer. Sources which are not variable are heavily resolved with VLBI, and sources which have compact, simple VLBI structures are all variable, so there are no good "​primary calibrators"​ for VLBI.+Unfortunately,​ calibration of VLBI data is not as simple as calibration of data from a compact interferometer. Sources which are not variable are normally ​heavily resolved with VLBI, and sources which have compact, simple VLBI structures are almost ​all variable, so there are no good "​primary calibrators"​ for VLBI.
  
 The exact steps involved in LBA amplitude calibration depend on whether data was **correlated** before 2010, or after 1 January 2010. (NB a lot of experiments **observed** in 2009 were correlated in 2010.) The exact steps involved in LBA amplitude calibration depend on whether data was **correlated** before 2010, or after 1 January 2010. (NB a lot of experiments **observed** in 2009 were correlated in 2010.)
lbaops/lbacalibrationnotes.txt · Last modified: 2016/01/05 13:00 by cormac