Author Archives: Marc Andre

New Firmware 1.2.223

I’ve published a new maintenance release of the firmware. The new release contains support for the new hardware series from Flytec. Additionally I’ve added a few new features:
– Support for inHg QNH
– Support for >2GB SD Cards
The new firmware can be downloaded in the Official’s section.


Welcome to the official homepage for the FAI/CIA balloon competition loggers.
The logger project started 2007 and is hosted by FAI/CIA/NTSC. Since then professional devices based on the hardware by Flytec and firmware by Marc André have been engineered. Currently FAI/CIA owns a pool of 110 devices and these devices are used throughout the world for balloon competitions including World and European championships. Since May 2013 the devices may also be bought by individuals or organizations.
This homepage also contains lots of information for pilots and officials about using the loggers.

Since March 2013, you may also buy your own logger. Up to now more than 40 loggers have been sold to pilots.

You can now buy your own logger!

As decided by the FAI/CIA plenary, the loggers can now be bought by any individual or organization. The devices are available through any Flytec dealer.

Find more information and prices on the buy-a-logger page.

All loggers are entitled for unlimited firmware upgrade. Support documents and instructions can be found on this homepage. Hardware support is provided by Flytec and software support by the New Technology Subcommittee of the FAI Ballooning Commission.
The purchased loggers may not be rented in pools to competitions outside the country of the owner. See details on the buy-a-logger page.


newsletterWith our lately introduced newsletter we will try to inform you more actively on new versions of software and new posts on this website.
Please use the registration field in the right column to subscribe with your email address. We will not send more than a few emails per year and certainly not give the address to any third party. You can unsubscribe anytime, see link in each email.
Don’t forget to also become a member of our Facebook Group.

Instrument error correction

The FAI logger allow instrument error correction to adjust for instrument error and drift of the sensors. The instrument error adjustment is configured using a separate config file (inst_cal.cfg) which is placed on the SD card. I’ve written many emails telling officials how to do this. I think it is time to post it…
I suggest to do the correction whenever possible. If you don’t use it, make sure the inst_cal.cfg file doesn’t exist on the loggers.

  1. Make sure the devices don’t have any inst_cal.cfg on the SD card and that the altitude is set to barometric. Probably best is to not use any SD card at all.
  2. Switch all devices on with the correct QNH. Let them heat up for 10-15 minutes
  3. Note the indicated altitude for all loggers.
  4. Use the Excel sheet to calculate the instrument error. If the reference altitude is known, it should be entered. If it is unknown, the median will be used. In that case the loggers are corrected among each other, but the absolute altitude might have some offset.
  5. Use the Excel sheet to create the inst_cal.cfg file. This file has the format XXX=123 with XXX being the 3-digit serial number and 123 being the altitude correction in decimeter. This value will be added to the measured altitude to get the indicated altitude. A single inst_cal.cfg file can contain the instrument error for all loggers used in the event.
  6. Copy the inst_cal.cfg to all SD cards or use BLM to copy it when initializing the SD card.
  7. Optional: Start all loggers again and check if the indicated altitude is within a small offset (Usually within 8m).

Important Note: The instrument error file on the logger is only used to adjust the indicated altitude. The altitude stored in the IGC file is not modified. Thus the same instrument error must be added during scoring. Do not use the header information in the IGC file, but use a separate database to prevent cheating possibility.

Remark: Pre 1.3.246 firmware release the file was named insterr.cfg. Based on feedback the file was renamed to inst_cal.cfg. Versions 1.3.246 and later automatically rename insterr.cfg to inst_cal.cfg if no inst_cal.cfg exists yet.

Download Excel sheet

New Firmware 1.2.193

Finally I found time to release the new firmware 1.2.193. This version mainly contains a work-around for the “leap-second-issue”. The GPS time is adjusted to the real earth rotation with leap-seconds (see Wikipedia). Because the leap-second information is only transferred in a slow interval (10 minutes), we could observe since July 2012 a jump back in time of the track when this information was received.
The new firmware works around this issue and ensures that the track has a correct and smooth time for the whole recording. Additional information is available upon request.
The new firmware can be downloaded in the Official’s section.

New BLM 2.1.189

Added new feature:
– Display and export to excel of the position where a declaration was made

Fixed issues:
– Export also points with no GPS fix to BFA scoring text file
– Fixed issue with regional setting dependency of BFA scoring text export

The software can be downloaded on the BLM page.

Guidance documents

With the Scoring WG we agreed to post two guidance documents for working with the CIA loggers. The documents describe how logger handling errors were dealt with during the Europeans 2011 and give recommendations for fail-over procedures.
The documents will be discussed in the CIA forum and during the next CIA conference with the Scoring WG and eventually be included in the COH.

Logger fail-over procedures
Electronic Mark Errors

New BLM 2.1.187 / updated SignatureLib

Added new BLM with the following new features:
– Added Swedish Grid SWEREF 99 TM. (no firmware upgrade of loggers needed)
– Added Drag&Drop for opening files.
– Fixed issue for signature validation when IGC file contains non-ASCII characters.

Also SignatureVerifier and SignatureLib have been updated to fix the bug mentioned above (for developers only).

The software and firmware can be downloaded in the Official’s section

Big success at the Europeans in Lleida

For the first time the loggers have been used in a continental championship. At the Europeans in Lleida 77 competitors flew 7 flights and 24 tasks. A total more than 500 tracks (>1000h) have been recorded. The loggers worked flawlessly. The off/on-problem is resolved. During the whole event no pilots GPS had to be downloaded and no data was lost! A big success and important milestone for the logger project.