Intrack Crosstrack Radial using the
velocity as measured in the central body fixed frame. The Z axis is
outward along the radial, the Y axis is in the direction of the
cross product of the position and velocity measured in the central
body fixed frame and X axis is in the direction of motion and
constructed as Y x Z.
Name |
Dimension |
Type |
Description |
Time |
DateFormat |
Real Number |
Time. |
Sigma x |
DistanceUnit |
Real Number |
Square root of the first diagonal component of the
scaled covariance matrix. |
Sigma y |
DistanceUnit |
Real Number |
Square root of the second diagonal component of the
scaled covariance matrix. |
Sigma z |
DistanceUnit |
Real Number |
Square root of the third diagonal component of the
scaled covariance matrix. |
Correlation xy |
Unitless |
Real Number |
XY correlation coefficient of the scaled covariance
matrix. |
Correlation xz |
Unitless |
Real Number |
XZ correlation coefficient of the scaled covariance
matrix. |
Correlation yz |
Unitless |
Real Number |
YZ correlation coefficient of the scaled covariance
matrix. |
CovMtx xx |
Area |
Real Number |
XX Component of the Position Covariance Matrix |
CovMtx yx |
Area |
Real Number |
YX Component of the Position Covariance Matrix |
CovMtx yy |
Area |
Real Number |
YY Component of the Position Covariance Matrix |
CovMtx zx |
Area |
Real Number |
ZX Component of the Position Covariance Matrix |
CovMtx zy |
Area |
Real Number |
ZY Component of the Position Covariance Matrix |
CovMtx zz |
Area |
Real Number |
ZZ Component of the Position Covariance Matrix |
1/(Inverted Sigma x) |
DistanceUnit |
Real Number |
Square root of the inverse of the first diagonal
element of the inverse of the scaled covariance matrix. |
1/(Inverted Sigma y) |
DistanceUnit |
Real Number |
Square root of the inverse of the second diagonal
element of the inverse of the scaled covariance matrix. |
1/(Inverted Sigma z) |
DistanceUnit |
Real Number |
Square root of the inverse of the third diagonal
element of the inverse of the scaled covariance matrix. |
YPR321 yaw |
AngleUnit |
Real Number |
Yaw angle between the two sets of axes. Defines
rotation about the z-axis of the reference set, which occurs first
when using 321 (or YPR) sequence in YPR angles representation. |
YPR321 pitch |
AngleUnit |
Real Number |
Pitch angle between the two sets of axes. Defines
rotation about the y-axis of the reference set, which occurs second
when using 321 (or YPR) sequence in YPR angles representation. |
YPR321 roll |
AngleUnit |
Real Number |
Roll angle between the two sets of axes. Defines
rotation about the x-axis of the reference set, which occurs third
when using 321 (or YPR) sequence in YPR angles representation. |
Euler323
precession |
AngleUnit |
Real Number |
Precession angle between the two sets of axes.
Defines rotation about the z-axis of the reference set, which
occurs first when using 323 sequence in Euler angles
representation. |
Euler323
nutation |
AngleUnit |
Real Number |
Nutation angle between the two sets of axes.
Defines rotation about the y-axis of the set rotated through
precession, which occurs second when using 323 sequence in Euler
angles representation. |
Euler323 spin |
AngleUnit |
Real Number |
Spin angle between the two sets of axes. Defines
rotation about the z-axis of the set rotated through precession and
nutation, which occurs third when using 323 sequence in Euler
angles representation. |
q1 |
Unitless |
Real Number |
First element of quaternion (and of its vector
part) representing orientation between the two sets of axes. |
q2 |
Unitless |
Real Number |
Second element of quaternion (and of its vector
part) representing orientation between the two sets of axes. |
q3 |
Unitless |
Real Number |
Third element of quaternion (and of its vector
part) representing orientation between the two sets of axes. |
q4 |
Unitless |
Real Number |
Fourth element of quaternion (its scalar part)
representing orientation between the two sets of axes. |
Major Sigma |
DistanceUnit |
Real Number |
Square root of the maximum eigenvalue of the
projected covariance matrix. |
Intermediate
Sigma |
DistanceUnit |
Real Number |
Square root of the intermediate eigenvalue of the
scaled covariance matrix. |
Minor Sigma |
DistanceUnit |
Real Number |
Square root of the minimum eigenvalue of the
projected covariance matrix. |
Major Sigma Dir
x |
Unitless |
Real Number |
First component of the unit vector along the major
axis of the scaled ellipsoid. |
Major Sigma Dir
y |
Unitless |
Real Number |
Second component of the unit vector along the major
axis of the scaled ellipsoid. |
Major Sigma Dir
z |
Unitless |
Real Number |
Third component of the unit vector along the major
axis of the scaled ellipsoid. |
Minor Sigma Dir
x |
Unitless |
Real Number |
First component of the unit vector along the minor
axis of the scaled ellipsoid. |
Minor Sigma Dir
y |
Unitless |
Real Number |
Second component of the unit vector along the minor
axis of the scaled ellipsoid. |
Minor Sigma Dir
z |
Unitless |
Real Number |
Third component of the unit vector along the minor
axis of the scaled ellipsoid. |
Volume |
Volume |
Real Number |
Volume of the scaled equal probability density
ellipsoid defined by the scaled covariance matrix. |
SEP |
DistanceUnit |
Real Number |
Spherical error probable - statistically equivalent
spherical representation for the equal probability density
ellipsoid defined by the covariance matrix. |
Approx SEP |
DistanceUnit |
Real Number |
Fast approximation of "spherical error
probable". |