[FOSS-GPS] Inputting a known position.

[Glenn Thorpe]

Hello
Does RTKLIB have the provision to input the fact that I am at a known 
latitude and longitude?
Nowadays we can often identify our location to within a couple of 
decimeters.  Imagery in Google Earth has pixels of well less than two 
decimeters and the imagery placement seems to be within a few 
centimeters, so if I locate myself on say the end of a road marking I 
know my latitude & longitude to within two decimeters.
Inputting this known location into the calculation should achieve two 
desirable objectives.  Firstly it will provide an instantaneous 
elevation of within double the error of the latitude & longitude, so in 
the case mentioned an instantaneous elevation of +/- 4 decimeters.  This 
is what many modern pseudo-surveyors want and will really appreciate!  
Secondly it will speed up the time to full fix very considerably, by the 
length of time it currently takes to get to the accuracy of the known 
position.
Thanks for your time
Glenn