Skip to content

Add BDot ephemeris log #9

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
rskew merged 1 commit into from
Sep 28, 2018
Merged

Add BDot ephemeris log #9

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
54 changes: 51 additions & 3 deletions simulator/src/main/java/msp/simulator/utils/logs/ephemeris/EphemerisGenerator.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -112,6 +112,10 @@ public class EphemerisGenerator {

private File fileAEM_torque;

/** vector for the change in the magnetic field vector */

private File fileAEM_bDot;

/** Attitude AEM File Writer. */
private FileWriter writerAEM_mag;

Expand All @@ -120,6 +124,7 @@ public class EphemerisGenerator {
private FileWriter writerAEM_angMomentum;
private FileWriter writerAEM_angVel;
private FileWriter writerAEM_torque;
private FileWriter writerAEM_bDot;

/** OrbitWrapper OEM File Writer */
private FileWriter writerOEM;
Expand Down Expand Up @@ -170,6 +175,7 @@ public void start() {
this.fileAEM_angVelocity = new File(common + "ang_mom-" + "AEM.txt");
this.fileAEM_angMomentum = new File(common + "ang_vel-" + "AEM.txt");
this.fileAEM_torque = new File(common + "torque-" + "AEM.txt");
this.fileAEM_bDot = new File(common + "b_dot-" + "AEM.txt");

if (!fileOEM.getParentFile().exists()) {
fileOEM.getParentFile().mkdirs();
Expand All @@ -189,6 +195,9 @@ public void start() {
if (!fileAEM_torque.getParentFile().exists()) {
fileAEM_torque.getParentFile().mkdir();
}
if (!fileAEM_bDot.getParentFile().exists()) {
fileAEM_bDot.getParentFile().mkdir();
}


try {
Expand All @@ -200,6 +209,7 @@ public void start() {
fileAEM_angMomentum.createNewFile();
fileAEM_angVelocity.createNewFile();
fileAEM_torque.createNewFile();
fileAEM_bDot.createNewFile();

/* Creating each associated Writer. */
this.writerOEM = new FileWriter(this.fileOEM);
Expand All @@ -208,19 +218,22 @@ public void start() {
this.writerAEM_angVel = new FileWriter(this.fileAEM_angVelocity);
this.writerAEM_angMomentum = new FileWriter(this.fileAEM_angMomentum);
this.writerAEM_torque = new FileWriter(this.fileAEM_torque);
this.writerAEM_bDot = new FileWriter(this.fileAEM_bDot);
/* Generating the headers. */
this.writerAEM.write(this.getAemHeader(OBJECT_NAME, SIMU_ID));
this.writerOEM.write(this.getOemHeader(OBJECT_NAME, SIMU_ID));
this.writerAEM_mag.write(this.getVectorVisHeader("MAGNETIC_FIELD",OBJECT_NAME, SIMU_ID));
this.writerAEM_angMomentum.write(this.getVectorVisHeader("ANGULAR-MOMENTUM", OBJECT_NAME,SIMU_ID));
this.writerAEM_angVel.write(this.getVectorVisHeader("ANGULAR-VELOCITY", OBJECT_NAME,SIMU_ID));
this.writerAEM_torque.write(this.getVectorVisHeader("TORQUE", OBJECT_NAME,SIMU_ID));
this.writerAEM_bDot.write(this.getVectorVisHeader("B_DOT", OBJECT_NAME,SIMU_ID));
this.writerOEM.flush();
this.writerAEM.flush();
this.writerAEM_mag.flush();
this.writerAEM_angMomentum.flush();
this.writerAEM_angVel.flush();
this.writerAEM_torque.flush();
this.writerAEM_bDot.flush();
} catch (IOException e) {
e.printStackTrace();
}
Expand All @@ -233,6 +246,11 @@ public void stop() {
try {
this.writerOEM.close();
this.writerAEM.close();
this.writerAEM_mag.close();
this.writerAEM_angMomentum.close();
this.writerAEM_angVel.close();
this.writerAEM_torque.close();
this.writerAEM_bDot.close();
} catch (IOException e) {
e.printStackTrace();
}
Expand Down Expand Up @@ -362,6 +380,32 @@ public void writeStep(Satellite satellite) {
;
this.writerAEM_mag.append(buff.toString()+ LS);
this.writerAEM_mag.flush();


buff = new StringBuffer();

/** Writing to the b dot file */
/* Ignore the rotation of the magnetic field due to the linear movement of
* the spacecraft
*/
Vector3D b_dot = Vector3D.crossProduct(vel, mag_field);
buff
.append(days)
.append(" ") /* Column Separator */
.append(seconds)
.append(" ")
.append(b_dot.getX())
.append(" ")
.append(b_dot.getY())
.append(" ")
.append(b_dot.getZ())
.append(" ")
.append(0)
;
this.writerAEM_bDot.append(buff+LS);
this.writerAEM_bDot.flush();


buff = new StringBuffer();
/* Writing the OEM Ephemeris. */
Vector3D position = newState
Expand All @@ -379,7 +423,7 @@ public void writeStep(Satellite satellite) {
.append(" ")
.append(position.getZ() * 1e-3)
;


this.writerOEM.append(buff.toString() + LS);
this.writerOEM.flush();
Expand Down Expand Up @@ -416,14 +460,18 @@ public void writeStep(Satellite satellite) {
"Attitude: [{}, {}, {}, {}] \n" +
"Spin : {} \n" +
"RotAcc : {}\n" +
"Momentum: {}",
"B Dot : {}\n" +
"Momentum: {}\n" +
"Momentum Norm: {}",
newState.getAttitude().getRotation().getQ0(),
newState.getAttitude().getRotation().getQ1(),
newState.getAttitude().getRotation().getQ2(),
newState.getAttitude().getRotation().getQ3(),
newState.getAttitude().getSpin().toString(),
newState.getAttitude().getRotationAcceleration().toString(),
satellite.getAssembly().getAngularMomentum()
b_dot,
satellite.getAssembly().getAngularMomentum(),
satellite.getAssembly().getAngularMomentum().getNorm()
);

} catch (OrekitException | IOException e) {
Expand Down