[daip] Option for CLCOR

[Leonia Kogan]

I' ll look in that.

Leonia

Mark Reid wrote:
> Leonia,
>
>    As we discussed last week in Socorro, it would be very useful if 
> you could add an option to CLCOR that is similar to ATMO (which 
> corrects for zenith delays from the neutral atmosphere), but works for 
> ionospheric zenith delays.  Perhaps the OPCODE could be called IONO, 
> although that is close to the existing code IONS.
>
> For ATMO (neutral atmosphere) corrections are made for group_delay and 
> phase_delay.   The normal convention is that
>              phase_delay = + freq * group_delay
>
> For IONO (ionized medium is dispersive) the group_delay correction is 
> the same, however the phase_delay corrections have the opposite signs:
>
>              phase_delay = - freq * group_delay
>
> It would be easiest for the user if the input file had the identical 
> format as for ATMO.
>
> The only other complication is that the mapping function (how one 
> scales zenith delays to other zenith angles) is somewhat different 
> from that of the neutral atmosphere, since the ionosphere is modeled 
> as a thin layer that is fairly high above the surface of the Earth.  
> The equations are given in Thomson, Moran & Swenson 2nd edition, page 
> 560, equations 13.139 and 13.140.
>
> Let me know if you have any questions.
>
> Thanks,
> Mark
>
> -------------------------------------------------------------
> Mark J. Reid                 Phone: 617-495-7470
> Harvard-Smithsonian CfA      Fax  : 617-495-7345
> 60 Garden Street             Email: reid at cfa.harvard.edu
> Cambridge, MA 02138, USA     Web  : www.cfa.harvard.edu/~reid
> -------------------------------------------------------------