OrbitSync

Category

SPAPT

Function

Interpolates spacecraft position in MHD spatial coordinates and at MHD time.

Syntax

SCPosition = OrbitSync(Trajectory, MHDTime, CloudRadius);

Inputs

Name	Type	Default	Description
Trajectory	field	none	spacecraft trajectory (from ReadTrajectory)
MHDTime	vector	none	UT time (from yrdayhr)
CloudRadius	scalar	1.0	cloud around spacecraft in Re

Outputs

Name	Type	Description
SCPosition	field	position of spacecraft
CloudPosition	field	cloud points

Functional Details

Receives the spacecraft trajectory field (from ReadTrajectory) and the MHDTime (from yrdayhr). The module interpolates the position of the spacecraft trajectory at the UT of the MHD model, then outputs that interpolated position of the spacecraft.
Optional: The module also calculates the positions of 6 points separated from the position of the spacecraft by a distance CloudRadius. These points are effectively the centers of faces of a cube centered on the spacecraft position. The input CloudRadius is an optional parameter that specifies the distance (in X, Y, and Z) from the spacecraft that those cloud points are put.
The second output tab of OrbitSync is the

Trajectory	takes the s/c trajectory from ReadTrajectory
MHDTime	takes the UT time from yrdayhr

The following image is a portion of a network which illustrates the connections among modules that are used to extract MHD data at a certain time and place such as spacecraft coordinates.



To be used in conjunction with ReadTrajectory. Author T. Guild (tguild at bu.edu)

Example Visual Programs

5OrbitSynch.net

See Also

 ReadTrajectory,  yrdayhr