Rinex file question

[loyal]

I use NOTEPAD, but others use WORDPAD or various text editors.

Loyal

[Kris Morgan]

> I am trying to send a raw GPS file from a R6 Trimble receiver to OPUS. I take the .t02 (61922951.t02)from the controler, convert it to Rinex (61922951.13o) and send it to OPUS. The file is accepted. Then I get this message instead of a solution..
>
> FILE: 61922951.13o OP1382450991013
>
> 1014 The RINEX data submitted to OPUS contains data taken from more than one
> 1014 location. This can be verified by opening up your RINEX file and
> 1014 searching for “MARKER”. OPUS will only process data taken from one
> 1014 location. Try separating the data into individual files and then
> 1014 re-submit the data
> 1014 Aborting…
> 1014
>
>
> I took one observation. I dont have any software to veiw a Rinex so if anyone knows of a free download that would be great.
>
> Thanks for the help.

Here is what normally happens in that situation, you probably have the “power up” mode turned on (where it starts logging data immediately upon turning it on) and then you crank your base up and it kinda starts over.

Open that rinex file up in notepad and scroll down, probably two pages, and follow those directions that OPUS is giving you and remove the data between the bottom of the “big” header/notes and where you actually cranked it up with the DC which should, depending on how long you let it sit there, be a page or two, maybe three. Delete that area and resubmit. Editing rinex files is like hearding cats, but it is doable and painful to the point that you won’t have to fight it too many times without remembering these steps.

[paul-in-pa]

Use WordPad, Some RINEX Files Are Too Big For NotePad

Remember to save in current format, which is text.

I used to worry about ensuring the format was .06o etc. But one day I forgot and submitted a file with a name like ABCD2741.06o.txt. Opus opened it without a problem, discarding the .txt. I take it it is part of their format that takes multiple zipped files.

In addition I used to worry about having an 8 digit alphanumeric name. Again by mistake I found out OPUS does not care, taking more than 8 characters. OPUS renames your file per it’s rules before putting it in the proccessing queue. OPUS takes your first four characters (receiver or station name) the 3 character day of year and follows it with the correct alpha character a to x to signify the GPS hour within which the first observation falls.

Ending the file with year and “o”. I have never submitted a file with the wrong day of year or year so I do not know how it will react.

Once you tell Windoze to open a .13o file in WordPad it will use WordPad without prompting the next time. Windoze will need a new prompt on that first .14o file.

I have never considered manual editing of RINEX files an effort, in fact I open every one, even if no editing is considered to get a look at how good my data is.

A lot of my editing is because I use OPUS-RS which wants clean data of 4 observables, L1, P1/C1, L2 & P2. On startup the L data can be good and the P data may take an extra minute or 2 to be top quality. I take out epochs until at least 5 satellites are up to snuff. OPUS-RS does not look too far into a file before deciding if it wants to make the effort.

And OPUS-RS does make quite an effort; after deciding if your file is worthy of an attempt, it looks at your start and stop times and your raw location and starts searching for nearby CORS files spanning at least 15 minutes before and sfter your file. OPUS-RS rejects CORS files for holes in the data or poor data. The later is seen most often soon after an observation. Once poor CORS data is found external intervention can clean the CORS data up to make it OPUS-RS acceptable. The OPUS-RS takes up to 9 CORS and processes the data to come up with an atmospheric correction for your raw position. OPUS-RS then uses that atmospheric correction to more quickly resolve your submitted RINEX file. Back when I was playing with the beta versions of the OPUS-RS software I saw files where it could fix all ambiguities in 3 epochs. After that it is just more good data to improve the position precision.

Paul in PA

[trah]

Notepad++ is a free text editor program that I use for browsing rinex files. It can handle large files much better thane Notepad and doesn’t have formatting issues that sometimes are caused by the RINEX file line breaks.

http://notepad-plus-plus.org/download/v6.5.html