diff options
| author | Bdale Garbee <bdale@gag.com> | 2014-09-09 23:28:39 -0600 |
|---|---|---|
| committer | Bdale Garbee <bdale@gag.com> | 2014-09-09 23:28:39 -0600 |
| commit | 16405fd3eb6f82ef3a709e3ed30fc48faef7b547 (patch) | |
| tree | c111819b3ba0c9357af41c81b798326b9df7adad /ao-tools/lib/cc-convert.c | |
| parent | 5a2f6ed6210844f7284fbf9f7ecba68c8a14fa52 (diff) | |
| parent | 28bd5057252e61bc5b1a35a00bc1f9fdfde097f7 (diff) | |
Merge branch 'branch-1.5' into debian
Conflicts:
ChangeLog
Releasing
altosui/Instdrv/NSIS/Includes/java.nsh
altosui/altos-windows.nsi.in
configure.ac
doc/Makefile
doc/altusmetrum.xsl
micropeak/micropeak-windows.nsi.in
telegps/telegps-windows.nsi.in
Diffstat (limited to 'ao-tools/lib/cc-convert.c')
| -rw-r--r-- | ao-tools/lib/cc-convert.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/ao-tools/lib/cc-convert.c b/ao-tools/lib/cc-convert.c index 8d6876a0..b82dd778 100644 --- a/ao-tools/lib/cc-convert.c +++ b/ao-tools/lib/cc-convert.c @@ -108,6 +108,29 @@ cc_altitude_to_pressure(double altitude) return pressure; } +double +cc_altitude_to_temperature(double altitude) +{ + + double base_temperature = LAYER0_BASE_TEMPERATURE; + double temperature; + + int layer_number; /* identifies layer in the atmosphere */ + double delta_z; /* difference between two altitudes */ + + /* calculate the base temperature for the atmospheric layer + associated with the inputted altitude */ + for(layer_number = 0; layer_number < NUMBER_OF_LAYERS - 1 && altitude > base_altitude[layer_number + 1]; layer_number++) { + delta_z = base_altitude[layer_number + 1] - base_altitude[layer_number]; + base_temperature += delta_z * lapse_rate[layer_number]; + } + + /* calculate the pressure at the inputted altitude */ + delta_z = altitude - base_altitude[layer_number]; + temperature = base_temperature + lapse_rate[layer_number] * delta_z; + + return temperature - 273.15; +} /* outputs the altitude associated with the given pressure. the altitude returned is measured with respect to the mean sea level */ |