Instrument calibration flight test method utilizing the kinematic GPS

摘要

PROBLEM TO BE SOLVED: To provide a test method for precisely and easily measuring the geometric altitude of an aircraft in a high altitude area and calibrating instruments of the aircraft.;SOLUTION: (3) A reference point of established coordinates is provided for the vicinity of a flight test location, and the reference point and the aircraft are both equipped with a K-GPS reception device. (5) The surface pressure (P₀) and the surface temperature (T₀) of the reference point are measured. (6) The geometric altitude of the aircraft is measured by the K-GPS reception device. (7) The geometric altitude (H) of the aircraft determined on the basis of the difference in geometric altitude between the aircraft and the reference point; the surface pressure (P₀); and the surface temperature (T₀) are substituted in the equation (A): P=P_0×{1-0.0065H/(273.15+T₀)}^5.256 to convert the atmospheric pressure (P) of the altitude of flight. (8) The atmospheric pressure of an airborne ADC is calibrated by the atmospheric pressure P to correct measurement errors etc.;COPYRIGHT: (C)2010,JPO&INPIT