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AP_Baro: add get_air_density_ratio

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Jonathan Challinger 2015-04-28 11:15:49 -07:00 committed by Randy Mackay
parent 36cc832931
commit f381ef93e8
2 changed files with 9 additions and 0 deletions
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6
libraries/AP_Baro/AP_Baro.cpp
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@ -208,6 +208,12 @@ float AP_Baro::get_EAS2TAS(void)
return _EAS2TAS; return _EAS2TAS;
} }
// return air density / sea level density - decreases in altitude
float AP_Baro::get_air_density_ratio(void)
{
return 1.0f/(sq(get_EAS2TAS()));
}
// return current climb_rate estimeate relative to time that calibrate() // return current climb_rate estimeate relative to time that calibrate()
// was called. Returns climb rate in meters/s, positive means up // was called. Returns climb rate in meters/s, positive means up
// note that this relies on read() being called regularly to get new data // note that this relies on read() being called regularly to get new data

3
libraries/AP_Baro/AP_Baro.h
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@ -79,6 +79,9 @@ public:
// get scale factor required to convert equivalent to true airspeed // get scale factor required to convert equivalent to true airspeed
float get_EAS2TAS(void); float get_EAS2TAS(void);
// get air density / sea level density - decreases in altitude
float get_air_density_ratio(void);
// get current climb rate in meters/s. A positive number means // get current climb rate in meters/s. A positive number means
// going up // going up
float get_climb_rate(void); float get_climb_rate(void);