Flytec 5030 v2.24 * - Manual (Page 51)

Flytec
5030 GPS
suppress these vario swings caused by speed changes. A vario is only supposed to indicate
climb or sink caused by the surrounding air and not by conversion of speed to altitude.
When flying according to Speed to Fly, where speed adjustments are continuously
necessary, the TEC is of great help. The TEC also steadies acoustics and vario when
centring in a turbulent thermal. The penetration effect of the TEC can be adjusted in the
Basic Settings/TEC From experience we recommend values between 60 and 80%.
Complete control (100%) has not proved efficient, because even horizontal wind turbulences
can influence the TEC and make the vario a bit jumpy.
5.8 New Regulation for Record Flights or De-centralized
Competitions
Since the proof of a completed flight depends entirely on the GPS recording, it is important
to ensure that the GPS receiver receives satellite signals before take off. Please turn on the
Flytec 5030 GPS several minutes at least before take off so that even pre-flight events are
included in the recording. (Please also read 3.2 flight recording)
A barogram is also included in the recorded IGC data of each flight. Photographic proof and
confirmation by flight observers are no longer required for national performance flights. The
data can be sent directly to the judging committee (in Germany the DHV) via Internet. (See
also 4.1 Data Exchange by PC)
5.9 Proof of Flights - Security against Manipulation
The FAI (Féderation Aéronautique Internationale) and its subsidiary IGC (International
Gliding Committee) requires a recording format, which, besides the continuous recording of
time, and position, also includes the flight altitude. In so doing it replaces the standard
barograph. When transmitting flight data to the pilot's PC, a so-called IGC file is created,
which receives a digital signature authenticating the flight data, making the file fraud proof. If
only one bit in the flight data were changed, the signature would no longer correspond, and
the judging committee would be aware of the manipulation.
5.10 Digital Signature and OLC `Registration
The constantly growing popularity of decentralized competitions is still going on. Up to now,
26 countries have signed the new agreements. (Online Contest) These agreements state
that every flight submitted via the internet, has to follow the IGC format and must have a
digital signature. All flights have to be recorded in WGS84 map data format. Therefore, from
now on we support only WGS84.
In order that GPS receivers generally available on the market can be used, relevant
evaluation programmes like Compegps, Gpsvar, Maxpunkte or Seeyou calculate a digital
signature to allow submission of flights in the desired form. However, a signature created by
a PC provides limited safety against manipulation . Looking further ahead this signature will
most certainly have to come from the GPS data logger.
At the automatically or manually end of a flight this digital signature is created, , in the Flytec
5030 GPS and added to the logger's memory as a so called G- record. A message is
displayed “Generating Digital Signature” in the Info Field of the instrument. As this
calculation is very demanding it may take several minutes following a long flight with a short
scan rate set. Please wait until the relevant display disappears.
In case the OLC does not accept the flight data which were sent , call up again the
Flight - Analysis and recalculate the digital signature again by brief press of F2
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