diff options
Diffstat (limited to 'apps/systemlib/conversions.c')
| -rw-r--r-- | apps/systemlib/conversions.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/apps/systemlib/conversions.c b/apps/systemlib/conversions.c index 9105d83cb..78e89f951 100644 --- a/apps/systemlib/conversions.c +++ b/apps/systemlib/conversions.c @@ -42,6 +42,10 @@ #include "conversions.h" +#define air_gas_constant 8.31432f +#define air_density_sea_level 1.225f +#define absolute_null_kelvin 273.15f + int16_t int16_t_from_bytes(uint8_t bytes[]) { @@ -55,3 +59,8 @@ int16_t_from_bytes(uint8_t bytes[]) return u.w; } + +float get_air_density(float static_pressure, float temperature_celsius) +{ + return static_pressure/(air_gas_constant * (temperature_celsius + absolute_null_kelvin)); +} |