GPSCorrect.ssf invalid in Pathfinder Office

Question

I am trying to post-process data collected with a Juno 3B connected to a ProXRT, running ArcPad 10.0 R4 and GPSCorrect 3.40.  I'm collecting data as shapefiles (points) in a QuickProject and have copied the entire QuickProject folder onto my hard drive.

When I try to open the GPSCorrect.ssf file in the Differential Correction Wizard in Pathfinder Office, I get the following message: 
"Warning: One or more of the selected SSF file(s) are invalid or contain invalid time period information."

I've read the answer at this thread (http://forums.arcgis.com/threads/49643-w) and it doesn't seem to apply to me.  There is only one ssf file in the project, and the shapefile was created and all data collected within about 2 hours.

CheckSSF gives the following output:

[INDENT][INDENT]Check SSF Started
Checking these files from C:\Users\katycat\Desktop\QuickProject 2014-05-26 200540
    GPSCorrect.ssf
Current year is 2,014, Times are Local with UTC offset added

CHECKING FILE GPSCorrect.ssf
*************************

*** SSF FILE HEADER INFORMATION ***
    Version:                         331
    Source:                          -24,512  (hex: FFFFA040)
    Comment:                         Created by GPSCorrect Version 3.40
    Receiver Type:                   ProXRT
    Data Recorder Type:              GPScorrect for ArcPad
    Station Type:                    Rover
    Reference: 
        Longitude:                   87°40'35.01"W
        Latitude:                    42°02'58.68"N
        Height:                      150.60 meters
    GPS Week Number:                 1,797
    Start Time:                      17:23:39
    End Time:                        17:59:20
    UTC Offset:                      15.00 seconds
***
*** Read of file GPSCorrect.ssf failed
*** 
*** Bad 
*** Check SSF can not repair this problem
***
[/INDENT][/INDENT]

Any suggestions?  Is there a setting in ArcPad somewhere that I've missed?  Is that 15 second UTC offset the problem, and if so how can I fix it?

KathrynCatlin · Answer

Thanks for your reply!  Unfortunately, that does not seem to be the problem in my case.  I just collected some data in a new shapefile and made absolutely sure to close all the software -- still nothing.

Although this time the initial error message is simply "Invalid data file. Cannot open file." without mentioning a bad time period.

CheckSSF still gives the same output as above (barring obvious differences in the time of collection).

HanliePetoors_0-1752495798398.png

JustinStanfield · Answer

That's a common error when GPS freezes up, or you close out of the collection software without exiting. It also happens if you power off the GPS without exiting collection software. I usually have to open a trouble ticket and send the file to Trimble to have it processed.