Stange IGC read-out data

Hi all,

I have a strange readout of my flight recorder for last Monday's scratch flight.
I'm using an LX 7000 and I am viewing the flight on CU.
From about 20:57:40 UTC to 20:59:24 UTC my ship does not appear to be moving. But I do gain in altitude.

The expanded track that CU displays also looks rather ratty. And I also notice that I get an unusual amount of F-records. Those records seem to indicate that the system has enough satellites in view.

Below is an extract of the file in the area of question.
I can also send you the whole file.

Thanks for any insight can give me.

Heinz
soarboy at comcast.net

F20570008282607171505
B2057044723140N11934130WA0126001245
F20570408282607171115
B2057084723160N11934140WA0127001247
F2057080826071719111501
B2057124723190N11934040WA0127001248
F205712082826071719111501
B2057164723160N11933960WA0126301248
B2057204723130N11933990WA0126801248
B2057244723100N11934060WA0127701252
F2057240828260717191101
B2057284723080N11934110WA0127101254
F2057280828260717191115
B2057324723080N11934110WA0127901254
F205732082826071719111501
B2057364723200N11934130WA0128201258
B2057404723220N11934110WA0127901260
F2057400826071719111501
B2057444723220N11934110WA0128301262
F20574428260717191115
B2057484723220N11934110WA0128801264
B2057524723220N11934110WA0129301264
F2057522826071719111501
B2057564723220N11934110WA0129501264
F205756082826071719111501
B2058004723220N11934110WA0129701264
F2058000828260717191115
B2058044723220N11934110WA0130701264
B2058084723220N11934110WA0131701264
F2058082826071719111501
B2058124723220N11934110WA0131501264
F205812082826071719111501
B2058164723220N11934110WA0131801264
B2058204723240N11934140WA0132601270
F2058200828260717191115
B2058244723240N11934140WA0133301280
F205824082826071719111501
B2058284723240N11934140WA0133801286
F20582826071719111501
B2058324723240N11934140WA0134301288
F2058320828260717191101
B2058364723240N11934140WA0135301290
F2058362826071719111501
B2058404723240N11934140WA0136001292
F2058400828260717191115
B2058444723240N11934140WA0135701292
F20584408260719111501
B2058484723240N11934140WA0135701292
F205848082826071719111501
B2058524723240N11934140WA0136601292
B2058564723240N11934140WA0137601292
F20585628260717191115
B2059004723240N11934140WA0137701292
F2059000828260717191115
B2059044723240N11934140WA0137301292
F20590408282607171911
B2059084723240N11934140WA0138101292
F20590828260717191115
B2059124723240N11934140WA0139201292
F2059120828260717191115
B2059164723240N11934140WA0140201292
F20591628260717191115
B2059204723240N11934140WA0140801292
F205920082826071719111501
B2059244723240N11934140WA0141501292
B2059284723350N11934180WA0142901300
F2059280828260717191115
B2059324723500N11934260WA0143801338
F205932082826071719111501
B2059364723530N11934260WA0144201370
F2059360826071719111501
B2059404723560N11934170WA0144401392
F2059400828260717191101
B2059444723560N11934150WA0144701410
F2059442826071719111501
B2059484723570N11934190WA0146601420
F2059480828260717191115
B2059524723650N11934260WA0147301438
B2059564723680N11934230WA0146401450
F2059560826071719111501
B2100004723680N11934230WA0146601458

I have seen this one other time with an EW Microrecorder. The glider
stayed in one place and just went up/down. Strangest thing to watch.
After power cycling the unit everything was fine and never recurred.
Wish I had a solution for you.

- John