X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=doc%2Faltusmetrum.xsl;h=5dd93fdff287382690068444a336a15bc456d1c3;hp=66c2b339feb24013633c2b0a0fb614d11e80d923;hb=2e6c6a6c15a7cff9f20b70a4cf58697da1302f01;hpb=1bd781da934c738e0c9294197c7eb622b0710a9a diff --git a/doc/altusmetrum.xsl b/doc/altusmetrum.xsl index 66c2b339..5dd93fdf 100644 --- a/doc/altusmetrum.xsl +++ b/doc/altusmetrum.xsl @@ -258,7 +258,8 @@ NAR #88757, TRA #12200 A typical TeleMetrum or TeleMini installation involves attaching only a suitable Lithium Polymer battery, a single pole switch for power on/off, and two pairs of wires connecting e-matches for the - apogee and main ejection charges. + apogee and main ejection charges. All Altus Metrum products are + designed for use with single-cell batteries with 3.7 volts nominal. By default, we use the unregulated output of the Li-Po battery directly @@ -536,7 +537,7 @@ NAR #88757, TRA #12200 or radio link via TeleDongle.
- Radio Frequencies + Radio Frequency Altus Metrum boards support radio frequencies in the 70cm band. By default, the configuration interface provides a @@ -583,6 +584,90 @@ NAR #88757, TRA #12200 simultaneously.
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+ Maximum Flight Log + + TeleMetrum version 1.1 and 1.2 have 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 + (10 samples/second), there's plenty of space to store many + flights worth of data. + + + The on-board flash is partitioned into separate flight logs, + each of a fixed maximum size. Increase the maximum size of + each log and you reduce the number of flights that can be + stored. Decrease the size and TeleMetrum can store more + flights. + + + All of the configuration data is also stored in the flash + memory, which consumes 64kB on TeleMetrum v1.1/v1.2 and 256B on + TeleMetrum v1.0. This configuration space is not available + for storing flight log data. + + + To compute the amount of space needed for a single flight, + you can multiply the expected ascent time (in seconds) by + 800, multiply the expected descent time (in seconds) by 80 + and add the two together. That will slightly under-estimate + the storage (in bytes) needed for the flight. For instance, + a flight spending 20 seconds in ascent and 150 seconds in + descent will take about (20 * 800) + (150 * 80) = 28000 + bytes of storage. You could store dozens of these flights in + the on-board flash. + + + The default size, 192kB, allows for 10 flights of storage on + TeleMetrum v1.1/v1.2 and 5 flights on TeleMetrum v1.0. This + ensures that you won't need to erase the memory before + flying each time while still allowing more than sufficient + storage for each flight. + + + 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. + +
+
+ Ignite Mode + + Instead of firing one charge at apogee and another charge at + a fixed height above the ground, you can configure the + altimeter to fire both at apogee or both during + descent. This was added to support an airframe that has two + TeleMetrum computers, one in the fin can and one in the + nose. + + + Providing the ability to use both igniters for apogee or + main allows some level of redundancy without needing two + flight computers. In Redundant Apogee or Redundant Main + mode, the two charges will be fired two seconds apart. + +
+
+ Pad Orientation + + TeleMetrum measures acceleration along the axis of the + board. Which way the board is oriented affects the sign of + the acceleration value. Instead of trying to guess which way + the board is mounted in the air frame, TeleMetrum must be + explicitly configured for either Antenna Up or Antenna + Down. The default, Antenna Up, expects the end of the + TeleMetrum board connected to the 70cm antenna to be nearest + the nose of the rocket, with the end containing the screw + terminals nearest the tail. + +
@@ -1093,31 +1178,6 @@ NAR #88757, TRA #12200 size. A smaller value will allow more flights to be stored, a larger value will record data from longer flights. - - 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. - - - 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 1MB systems, or 10 flights in 2MB - systems. - - - 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. - - - TeleMini has 5kB of on-board storage, which is plenty for a - single flight. Make sure you download and delete the data - before subsequent flights, or TeleMini will not log any data. -
Ignite Mode @@ -1231,6 +1291,16 @@ NAR #88757, TRA #12200 your local radio regulations.
+
+ Imperial Units + + This switches between metric units (meters) and imperial + units (feet and miles). This affects the display of values + use during flight monitoring, data graphing and all of the + voice announcements. It does not change the units used when + exporting to CSV files, those are always produced in metric units. + +
Font Size @@ -1260,6 +1330,73 @@ NAR #88757, TRA #12200
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+ Configure Groundstation + + Select this button and then select a TeleDongle Device from the list provided. + + + The first few lines of the dialog provide information about the + connected device, including the product name, + software version and hardware serial number. Below that are the + individual configuration entries. + + + Note that the TeleDongle itself doesn't save any configuration + data, the settings here are recorded on the local machine in + the Java preferences database. Moving the TeleDongle to + another machine, or using a different user account on the same + machine will cause settings made here to have no effect. + + + At the bottom of the dialog, there are three buttons: + + + + + Save. This writes any changes to the + local Java preferences file. If you don't + press this button, any changes you make will be lost. + + + + + Reset. This resets the dialog to the most recently saved values, + erasing any changes you have made. + + + + + Close. This closes the dialog. Any unsaved changes will be + lost. + + + + + The rest of the dialog contains the parameters to be configured. + +
+ Frequency + + This configures the frequency to use for both telemetry and + packet command mode. Set this before starting any operation + involving packet command mode so that it will use the right + frequency. Telemetry monitoring mode also provides a menu to + change the frequency, and that menu also sets the same Java + preference value used here. + +
+
+ Radio Calibration + + The radios in every Altus Metrum device are calibrated at the + factory to ensure that they transmit and receive on the + specified frequency. To change a TeleDongle's calibration, + you must reprogram the unit completely, so this entry simply + shows the current value and doesn't allow any changes. + +
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Flash Image @@ -1388,8 +1525,9 @@ NAR #88757, TRA #12200 In the rocket itself, you just need a TeleMetrum or TeleMini board and - a Li-Po rechargeable battery. An 860mAh battery weighs less than a 9V - alkaline battery, and will run a TeleMetrum for hours. + a single-cell, 3.7 volt nominal Li-Po rechargeable battery. An + 850mAh battery weighs less than a 9V alkaline battery, and will + run a TeleMetrum for hours. A 110mAh battery weighs less than a triple A battery and will run a TeleMetrum for a few hours, or a TeleMini for much (much) longer. @@ -1783,7 +1921,7 @@ NAR #88757, TRA #12200 Select the image you want put on the TeleMetrum, which should have a - name in the form telemetrum-v1.1-1.0.0.ihx. It should be visible + name in the form telemetrum-v1.2-1.0.0.ihx. It should be visible in the default directory, if not you may have to poke around your system to find it. @@ -2421,7 +2559,8 @@ NAR #88757, TRA #12200 Release Notes - + +