[Difx-users] New to DiFX - issues with test dataset rdv70

[Geoff Crew]

Yes, one effectively has an average signal with some average of corrections.

(Fortunately no one has requested us to go to second order to sort that 
out, as it's intractable.)

On 8/12/21 8:43 AM, Rodrigo Amestica via Difx-users wrote:
> if in ALMA the DRY and WET corrections are applied per antenna, how could
> them be uncorrected from the phased VLBI station signal? Perhaps an average
> value can be calculated for the ALMA station as a whole?
>
> ps: I hope that my question helps for completness, without steering away
> from the original posting.
>
> On Thu, 12 Aug 2021 08:08:58 -0400 (34 minutes, 3 seconds ago), Geoff Crew via Difx-users <difx-users at listmgr.nrao.edu> wrote:
>> For completeness:  an array using Calc (e.g. ALMA) for its delay model
>> ends up having made these corrections; these must then be uncorrected
>> in the VLBI correlation.
>> On 8/11/21 11:02 PM, Adam Deller via Difx-users wrote:
>>>   * DRY and WET refer to specific sub-components of the delay model
>>> (the dry and wet troposphere, respectively.) You don't need to worry
>>> about those - they are just there in case for some reason a user
>>> wants to undo the default calculations of these contributions to the
>>> delay model in post-processing and re-apply their own. (Mostly used
>>> by geodesists.)
>> -- 
>> Geoff Crew
>> gbc at haystack.mit.edu
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-- 
Geoff Crew
gbc at haystack.mit.edu