Re: [gpsd-dev] [PATCH] Proofread the PPP doc.

[Gary E. Miller]

Yo Sanjeev!

Partially applied to git head.  GLONASS was intentionaly left enabled for
Javad GPS, so I did not apply that part.  It is only u-blox that needs
GLONASS off for RINEX. CSRS-PPP happily takes the Javad GLONASS raw
data and uses it to improve the results.

On Sun, 23 Dec 2018 03:00:17 +0800
Sanjeev Gupta <address@hidden> wrote:

> ---
>  www/ppp-howto.adoc | 11 ++++++-----
>  1 file changed, 6 insertions(+), 5 deletions(-)
> 
> diff --git a/www/ppp-howto.adoc b/www/ppp-howto.adoc
> index e85e72f6..be496d3e 100644
> --- a/www/ppp-howto.adoc
> +++ b/www/ppp-howto.adoc
> @@ -68,7 +68,7 @@ spot?
>  
>  All GNSS systems compute positions using ECEF (earth-centered,
>  earth-fixed) coordinates. After an ECEF position is calculated, it is
> -converted into latitude, longitude using a datum.  So many to
> +converted into latitude and longitude using a datum.  So many to
>  choose from.  You've probably heard of WGS84, NAD83, and maybe ITRF.
>  
>  NAD83 is pinned to the North American tectonic plate. WGS84 is pinned
> @@ -96,7 +96,7 @@ Original ITRF and WGS84 differ by less than 1
> meter, which is huge for the purposes here. ITRF2014 and WGS84(G1762)
> differ by a few centimeters.
>  
> -It gets worse. two expensive GPS often differ in altitude by over 60
> +It gets worse. Two expensive GPS often differ in altitude by over 60
>  feet. Altitude is calculated as height above Mean Sea Level (MSL).
> But the Earth is not a perfect sphere. It is more pear shaped. In
> addition gravitational anomalies affect 'sea level'.
> @@ -145,7 +145,7 @@ There are many possible adjustments to the above
> procedure. 
>  Maybe you want to collect just 10 minutes of data to verify that your
>  tool-chain is working before doing a 24 hour run. Simple, just change
> -`gpsprof -n 86400` to `gpsprof -n 360` and then proceed as above.
> +`gpsprof -n 86400` to `gpsprof -n 600` and then proceed as above.
>  
>  Maybe your _gpsd_ host does not have Python installed.  Just run
> _gpsprof_ remotely.  On the host you will need to run _gpsd_ with the
> `-g` parameter so @@ -295,16 +295,17 @@ and QZSS:
>  ...................................
>  $ zerk -d COMPASS
>  $ zerk -d GALILEO
> +$ zerk -d GLONASS
>  $ zerk -d SBAS
>  $ zerk -e GPS
>  ...................................
>  
> -Verify that only GPS and QZSS are enabled:
> +Verify that only GPS and (possibly) QZSS are enabled:
>  
>  ...................................
>  $ zerk -p CONS
>  zerk: poll CONS
> -RE:
> %cons%/par/pos/sys={gps=y,glo=y,gal=n,sbas=n,qzss=n,comp=n,irnss=n}
> +RE:
> %cons%/par/pos/sys={gps=y,glo=n,gal=n,sbas=n,qzss=n,comp=n,irnss=n} 
> ................................... 
>  Verify raw data messages are being sent:




RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

            Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin

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