How are the ephemeris data broadcast in GLONASS?
a) ECEF coordinates
b) ECI coordinates
c) Directional cosines
d) Geodetic spherical coordinates
Answer: a
Explanation: The GLONASS ephemeris data are broadcast as ECEF or Earth Center Earth Fixed coordinate system cartesian coordinates in position and velocity with lunar and solar acceleration perturbations parameters that are valid about 0.5 hour.
How are the ephemeris data broadcast in GLONASS?a) ECEF coordinatesb) ECI coordinatesc) Directional cosinesd) Geodetic spherical coordinates
Which coordinate system is used in satellite based radio navigation?a) Earth centered, Earth fixedb) Earth centered inertialc) Geodetic spherical coordinatesd) Geodetic wander azimuth
Which of the following is a four element entity consisting of a scalar and a vector and is used to describe strapdown system rotation?a) Directional cosinesb) Directional sinesc) Quaterniond) Triternion
Which of the following is a four element entity consisting of a scalar and a vector and is used to describe strapdown system rotation?a) Directional cosinesb) Directional sinesc) Quaterniond) Triternion
Which of the following is false with respect to Earth centered inertial coordinate system?a) Accuracy is 10-5/hrb) Newton’s laws are not validc) Angular coordinates of stars are conventionally tabulated in ECId) Used in mechanizing inertial navigators
What is the angle between the normal to the reference ellipsoid and the equatorial plane at a point called?a) Geodetic angleb) Correction factorc) Geodetic latituded) Earth angle
How are GLONASS satellites differentiated from each other?a) FDMAb) CDMAc) TDMd) WDM
How are GLONASS satellites differentiated from each other?a) FDMAb) CDMAc) TDMd) WDM
What is the spectral separation between each satellite L1 signal in the GLONASS?a) 50kHzb) 2MHzc) 1240MHzd) 562.5kHz
What type of antenna is used in GLONASS satellites?a) Helicalb) Beam antennac) Parabolic antennad) Loop antenna