MANUAL CORS DATA IMPORT IN RELIANCE

This outline has been designed assuming that

(1)	You have opened a new Reliance processor project, and have already downloaded the raw data files from the ROVER Super C/A receiver.
(2)	 You have the latest copy of Winzip on your computer.
(3)	You have downloaded and installed our RINEX 190 converter which is located at

ftp://ftp.ashtech.com/software/Rinex2%20v1.90/

	Make a shortcut to this converter on your desktop if desired.

****Note that the RINEX 190 converter is not to be installed in the Reliance directory, and is not started using the Reliance program****

Step 1 Set up the new Reliance Project settings

	In Reliance processor choose “Project Setup” in the Project Control BOX

		“Session settings” Tab:

			Create a new session, if desired.

			Leave the Reload data button unchecked.

			Leave the “Down load Rover data” button unchecked.

			Click on the location of the ROVER files on hard disk

			Make sure “Auto Search BASE” is unchecked

			Make sure “Use Averaged BASE position” is unchecked

		 “Map system” tab

Set up the required System, Datum, Display, and Unit settings. 

Note that since the CORS sites use NAD ’83 geographic coordinates, you should initially use NAD ’83 Geographic coordinates as the System and Datum. Meters are also recommended initially.

Choose “HAE” as the height datum, since the CORS sites usually give ellipsoid heights

		“Directories” tab

If you desire, set up the default directories as required to locate the BASE, ROVER, FEATURE, and WAYPOINT files.

The CHANGE FILE directory does not have to be modified.

Make sure “enable activity and error tracking” is checked on

Change the time zone to local time if desired. UTC is recommended because it is the default time Zone for the CORS data

Leave all other settings at defaults.

Hit “OK”

		Hit the “View Data” tab in “Project Control”

Look closely at the times that the ROVER data covers. This is done by looking at the time scale display in the Time View Window. Make a careful note also of the recording interval by left double clicking the colored bar

			“Edit Exit” to get out of the Time View Window

			“Edit Exit” to get out of the Map View window

Step 2 Retrieve the CORS RINEX data from the Internet. You will receive “.01O”, “.01N”, “.pos “, and “.txt “files

		In your Web Browser, type in www.ngs.noaa.gov

		Click on CORS 

If you already known which CORS station you want, click on “Customized File- UFCORS”

Set up the following on the UFCORS page:

Time Zone. 	This allows you to choose the correct CORS data to match your ROVER data.

Starting day	The day your ROVER data was collected.

Start time. 	Make sure your start time is before the start time of your ROVER data

Number of hours. 	Make sure you have enough to after the end time of your ROVER data.

Click on “CONTINUE”

				Choose the station you want. Example amc2

				Choose “as is” for the interpolation information

Choose “yes” for receiving the corresponding NGS data sheet

Select “no” for receiving the IGS orbits in SP3 format.

Choose “pkzip” for compression 

				Click on “SUBMIT”
	
Choose “open this file from its current location” in the file download window

Choose “I agree” in the Winzip window

Click on “Extract” and choose a location on your hard drive to extract the CORS data to. 

Click on “Extract”. The CORS RINEX files are now located on your hard disk.

	Step 3			Interpolate the CORS data

In Reliance choose Tools Rinex interpolation

Click on “input O-file” and locate the .01O file that you had extracted in Step 2 previously

Choose an “output O-file file name” that is slightly different than the “input O-file name”. Make sure you have the same number of characters in the prefix of the filename as originally.

	Example: sutb1420.01o could be renamed to 

	SUTB142i.01o

Choose a “new interval” that matches the recording interval of your ROVER data from Step 1 above.

Leave all other settings at default values.
	
Click on “Interpolate”. The RINEX data will now be interpolated. Once this is complete, the progress bar will disappear. 

	Step 4  Convert the interpolated RINEX data to B and E format

Start the RINEX 190 converter. Note that this is not done through the Reliance program.

Choose the output directory to be the same directory as the interpolated RINEX files are located.

Hit the large ARROW that says BEGIN

Wait until you see 100% Complete in the B and E files conversions. Select “exit”

	Step 5  Import the CORS B and E files into Reliance processor

In Reliance Project setup tab Selected Session Definition select the location of the B and E files from Step 4

Enter the known coordinates of the CORS site in the BASE station Position. The known coordinates can be checked against the .pos file that was downloaded from the CORS site.

In the Reliance Map System tab, chose the datum, system, and units that you require. Choose MSL if you require mean Sea Level heights.

Hit “OK” 

	Step 6 Process the CORS data

			In Reliance, Project Control, select “Process data”

Select the session you require, and the processing settings you desire. Select “Begin”

The data should now process. View and export the data from Reliance processor as you normally would.