TeleMetrum version 1.1 has 2MB of on-board flash storage,
enough to hold over 40 minutes of data at full data rate
(100 samples/second). TeleMetrum 1.0 has 1MB of on-board
- storage. As data are stored at a reduced rate during
- descent, there's plenty of space to store many flights worth
- of data.
+ storage. As data are stored at a reduced rate during descent
+ (10 samples/second), there's plenty of space to store many
+ flights worth of data.
</para>
<para>
The on-board flash is partitioned into separate flight logs,
flying each time while still allowing more than sufficient
storage for each flight.
</para>
+ <para>
+ As TeleMini does not contain an accelerometer, it stores
+ data at 10 samples per second during ascent and one sample
+ per second during descent. Each sample is a two byte reading
+ from the barometer. These are stored in 5kB of
+ on-chip flash memory which can hold 256 seconds at the
+ ascent rate or 2560 seconds at the descent rate. Because of
+ the limited storage, TeleMini cannot hold data for more than
+ one flight, and so must be erased after each flight or it
+ will not capture data for subsequent flights.
+ </para>
</section>
<section>
<title>Ignite Mode</title>
size. A smaller value will allow more flights to be stored,
a larger value will record data from longer flights.
</para>
- <para>
- During ascent, TeleMetrum records barometer and
- accelerometer values 100 times per second, other analog
- information (voltages and temperature) 6 times per second
- and GPS data once per second. During descent, the non-GPS
- data is recorded 1/10th as often. Each barometer +
- accelerometer record takes 8 bytes.
- </para>
- <para>
- The default, 192kB, will store over 200 seconds of data at
- the ascent rate, or over 2000 seconds of data at the descent
- rate. That's plenty for most flights. This leaves enough
- storage for five flights in a 1MB system, or 10 flights in a
- 2MB system.
- </para>
- <para>
- The configuration block takes the last available block of
- memory, on v1.0 boards that's just 256 bytes. However, the
- flash part on the v1.1 boards uses 64kB for each block.
- </para>
- <para>
- TeleMini has 5kB of on-board storage, which is plenty for a
- single flight. Make sure you download and delete the data
- before a subsequent flight or it will not log any data.
- </para>
</section>
<section>
<title>Ignite Mode</title>