GLAST Early CLA Partial Results

Tracker to Tracker and Tracker to ACD Relative Displacements

 

Spectrum Astro S/C, Delta 7920H-10 Launch Vehicle

Liftoff, Transonic, and Max Q Dynamic Launch Events

 

Farhad Tahmasebi/NASA/GSFC/542 and Carlton Miller/Swales

12/16/03

 

Tracker to Tracker and Tracker to ACD Relative Displacements

Description

X (mm)

Y (mm)

Z (mm)

Tracker 12 relative to tracker 11

0.1089

0.2809

0.5062

Tracker 13 relative to tracker 12

0.1895

0.1059

0.5148

Tracker 14 relative to tracker 13

0.0972

0.2580

0.5052

Tracker 22 relative to tracker 21

0.1964

0.1583

0.5141

Tracker 23 relative to tracker 22

0.2079

0.0985

0.5091

Tracker 24 relative to tracker 23

0.1935

0.1537

0.5422

Tracker 32 relative to tracker 31

0.1889

0.1542

0.5193

Tracker 33 relative to tracker 32

0.1912

0.0992

0.5069

Tracker 34 relative to tracker 33

0.1920

0.1545

0.5475

Tracker 42 relative to tracker 41

0.0979

0.2718

0.4996

Tracker 43 relative to tracker 42

0.1927

0.1068

0.5082

Tracker 44 relative to tracker 43

0.0945

0.2699

0.5188

Tracker 21 relative to tracker 11

0.2289

0.1062

0.6537

Tracker 31 relative to tracker 21

0.1007

0.0707

0.6487

Tracker 41 relative to tracker 31

0.2375

0.1223

0.6220

Tracker 22 relative to tracker 12

0.1489

0.2339

0.6589

Tracker 32 relative to tracker 22

0.0945

0.1990

0.6379

Tracker 42 relative to tracker 32

0.1523

0.2575

0.5508

Tracker 23 relative to tracker 13

0.1538

0.2409

0.6619

Tracker 33 relative to tracker 23

0.0969

0.1901

0.6455

Tracker 43 relative to tracker 33

0.1541

0.2567

0.5746

Tracker 24 relative to tracker 14

0.2319

0.1144

0.6511

Tracker 34 relative to tracker 24

0.1038

0.0583

0.6630

Tracker 44 relative to tracker 34

0.2313

0.1304

0.6569

ACD relative to tracker 14

0.2517

0.3593

0.0724

 

Notes:

     Relative displacements due to the MECO launch event are not included in the above table.

     The numbering convention for the sixteen trackers is shown in the following table. Note that tracker numbers consist of two digits. The first digit stands for the tracker row number and the second digit denotes the tracker column number. Also note that the CGs of the trackers in row one have the highest Y coordinates, and CGs of the trackers in the fourth column have the largest X coordinates (in the LAT coordinate system).

Tracker numbering convention

11

12

13

14

21

22

23

24

31

32

33

34

41

42

43

44