Changes between Version 23 and Version 24 of TBR/UserApp/MMS_Instruments_Suite


Ignore:
Timestamp:
Dec 6, 2011, 1:30:20 AM (7 years ago)
Author:
Ivaylo
Comment:

/* MMS Instruments */

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  • TBR/UserApp/MMS_Instruments_Suite

    v23 v24  
    6262The MMS instrumentation consists of three major systems:
    6363
    64     *An air motion sensing system to measure the velocity of the air with respect to the aircraft, i.e., the true air speed.
    65     *An inertial navigation system to measure the velocity of the aircraft with respect to the earth, i.e., the ground speed.
    66     *A data acquisition system to sample, process and record the measured quantities.
     64    An air motion sensing system to measure the velocity of the air with respect to the aircraft, i.e., the true air speed.
     65    An inertial navigation system to measure the velocity of the aircraft with respect to the earth, i.e., the ground speed.
     66    A data acquisition system to sample, process and record the measured quantities.
    6767
    6868The air motion sensing system consists of sensors, which measure temperature, pressures, and airflow angles (angle of attack and yaw angle). The Litton LN-100G Embedded GPS Inertial Navigation System (INS) provides the aircraft attitude, position, velocity, and acceleration data. On the DC-8, the Trimble TANS Vector provides secondary attitude and navigation data. The TANS Vector utilizes the GPS carrier phase shift between multiple antennas to derive independent aircraft attitude. The Data Acquisition System samples the independent variables simultaneously and provides control over all system hardware.
     
    7474The system calibration of the MMS consists of:
    7575
    76     *Individual sensor calibrations.
    77     *Sensor dynamical response tests.
    78     *Laboratory determination of the dynamic behavior of the inertial navigation system.
    79     *In-flight calibration.
    80     *Comparison with radiosonde and radar-tracked balloons.
     76    Individual sensor calibrations.
     77    Sensor dynamical response tests.
     78    Laboratory determination of the dynamic behavior of the inertial navigation system.
     79    In-flight calibration.
     80    Comparison with radiosonde and radar-tracked balloons.
    8181
    8282Individual sensors are routinely re-certified to NIST standard by their respective calibration laboratories. Specific MMS sensor configuration are tested rather than the nominal set-up. For example, a temperature bath calibration is determined for a specific platinum sensor matched to a specific signal conditioner. Another example is that the recovery correction for a specific temperature probe is re-established by wind tunnel testing.