// @Description: User provided ambient ground temperature in degrees Celsius. This is used to improve the calculation of the altitude the vehicle is at. This parameter is not persistent and will be reset to 0 every time the vehicle is rebooted. A value of 0 means use the internal measurement ambient temperature.
// @Description: altitude offset in meters added to barometric altitude. This is used to allow for automatic adjustment of the base barometric altitude by a ground station equipped with a barometer. The value is added to the barometric altitude read by the aircraft. It is automatically reset to 0 when the barometer is calibrated on each reboot or when a preflight calibration is performed.
// @Description: This selects the bus number for looking for an I2C barometer. When set to -1 it will probe all external i2c buses based on the GND_PROBE_EXT parameter.
// @Values: -1:Disabled,0:Bus0,1:Bus1
// @User: Advanced
AP_GROUPINFO("EXT_BUS",7,AP_Baro,_ext_bus,-1),
AP_GROUPINFO("_EXT_BUS",7,AP_Baro,_ext_bus,-1),
// @Param: SPEC_GRAV
// @Param: _SPEC_GRAV
// @DisplayName: Specific Gravity (For water depth measurement)
// @Description: This sets the specific gravity of the fluid when flying an underwater ROV.
// @DisplayName: Range in which sample is accepted
// @Description: This sets the range around the average value that new samples must be within to be accepted. This can help reduce the impact of noise on sensors that are on long I2C cables. The value is a percentage from the average value. A value of zero disables this filter.
// @Description: This sets which types of external i2c barometer to look for. It is a bitmask of barometer types. The I2C buses to probe is based on GND_EXT_BUS. If GND_EXT_BUS is -1 then it will probe all external buses, otherwise it will probe just the bus number given in GND_EXT_BUS.
// @Description: This sets which types of external i2c barometer to look for. It is a bitmask of barometer types. The I2C buses to probe is based on GND_EXT_BUS. If BARO_EXT_BUS is -1 then it will probe all external buses, otherwise it will probe just the bus number given in GND_EXT_BUS.