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- At 1 cm, SNR @ MPIfR is really lower somewhy. ASC had not introduced any a priori delay offset to the GBT (which we know to be ~17 musec). Hence our 3 musec delay offset agrees with their 20 musec offset.
- The procedure in ASC for producing polynomials is the following:
- Take a first order guess of the polynomial
- correlate, find a fringe, add delay|rate offsets to a setup file (like we do with a vex or v2d file for DiFX)
- recalculate polynomials with offsets taken into account
- Hence, polynomial coefficients should be valid for the offsets that were used by the ASC correlator (
For real observations, we will never have a recalculated poly. Need to perform the following test: take first order guess poly for rk12cj from ASC and try to correlate with it.That was an initial poly wich we got from ASC.))
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Version from 13:40, 17 May 2019
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- At 1 cm, SNR @ MPIfR is really lower somewhy. ASC had not introduced any a priori delay offset to the GBT (which we know to be ~17 musec). Hence our 3 musec delay offset agrees with their 20 musec offset.
- The procedure in ASC for producing polynomials is the following:
- Take a first order guess of the polynomial
- correlate, find a fringe, add delay|rate offsets to a setup file (like we do with a vex or v2d file for DiFX)
- recalculate polynomials with offsets taken into account
- Hence, polynomial coefficients should be valid for the offsets that were used by the ASC correlator (For real observations, we will never have a recalculated poly. Need to perform the following test: take first order guess poly for rk12cj from ASC and try to correlate with it.
)
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Version as of 22:46, 19 May 2019
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- At 1 cm, SNR @ MPIfR is really lower somewhy. ASC had not introduced any a priori delay offset to the GBT (which we know to be ~17 musec). Hence our 3 musec delay offset agrees with their 20 musec offset.
- The procedure in ASC for producing polynomials is the following:
- Take a first order guess of the polynomial
- correlate, find a fringe, add delay|rate offsets to a setup file (like we do with a vex or v2d file for DiFX)
- recalculate polynomials with offsets taken into account
- Hence, polynomial coefficients should be valid for the offsets that were used by the ASC correlator (
For real observations, we will never have a recalculated poly. Need to perform the following test: take first order guess poly for rk12cj from ASC and try to correlate with it.That was an initial poly wich we got from ASC.)
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