[time-nuts] Lady Heather V6.0 and RINEX files...

Bob kb8tq kb8tq at n1k.org
Tue Jul 3 13:14:34 EDT 2018


Hi



> On Jul 2, 2018, at 6:49 PM, Michael Baker <mpb45 at clanbaker.org> wrote:
> 
> Time Nutters--
> 
> Mark Sims said of the latest release of Lady Heather:
> 
>> There are several cosmetic tweaks.  
> 
> A major new feature is the ability to write RINEX files for receivers that can output satellite RAW observation data.   RINEX files can be processed to produce very accurate positions (typically 150-250mm for L1 only receivers,  10mm for L1/L2 receivers).   The recommended online processor is CSRS-PPP from Natural Resources of Canada (NARCAN)... they seem to be the only service that supports L1 only data.
> ************
> 
> In layman's terms, what does this mean with regard to being
> able to set an *AFFORDABLE* GPS RX out in the field and use it
> to do site surveys and process the recorded RINEX data later to
> establish the geo-position of each of the sites within a precision
> of +/- a few centimeters?  I presume this may not be a simple as
> setting up my Trimble Thunderbolt and Lady Heather V6.0 in the
> field and gathering RINEX files for a few minutes....??

Even with L1/L2 survey gear, “a few centimeters” is a bit more than a 
few minutes of data. So far, 24 hour records with L1 gear have given
meter level precision. 

Bob


> 
> Mike Baker
> Micanopy, FL
> *************
> 
> 
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