(GLAS) PRECISION ATTITUDE DETERMINATION - Center for ...

More documents

Recommendations

Info

Table 3.1: Characteristics of the commercial star trackers [5] [2] [49]. The performanceparameters of the Ball CT-602 is identical to the CT-601 except the weight and the powerrequirement.CHARACTERISTICS HD-1003 CT-601 AST yField of View 8 8 8 8 8:8 8:8 Sensitivity Range (M v ) +2 to +6 +1 to +6 +7.5Accuracy (arcsec, 1) z 6 3 (bias) 1in Roll and Pitch5 (random)Update Rate (Hz) 10 10 10 or 5Acquisition Time(Full Field, second) 6 5 N/AMaximum Numberof Stars Tracked 6 5 20Maximum Power (W) 12
Table 3.2: Test results of HD-1003 star tracker from nal performance tests. The specicrequirements were given for GLAS. For the dynamic accuracy test, the star position erroris eectively rms of bias and random noise.Star Position ErrorError Source Requirement Measured ROW Measured COLType Magnitude (1 per axis) axis error (1) axis error (1)static 3.0 m i 4.5 arcsec 1.23 arcsec 1.28 arcsecbias 5.5 m i 4.5 arcsec 2.44 arcsec 2.60 arcsecstatic 3.0 m i 3.3 arcsec 0.94 arcsec 0.54 arcsecrandom noise 5.5 m i 3.3 arcsec 2.53 arcsec 2.16 arcsecdynamic rms 5.5 m i 5.0 arcsec 2.95 arcsec 3.23 arcsecMagnitude ErrorError Source Source Required MeasuredType Movement Magnitude error3 static 3.0 m i 0.24 m i 0.12 m irepeatability static 5.5 m i 0.24 m i 0.12 m idynamic 5.5 m i 0.24 m i 0.18 m istatic 3.0 m i 0.12 m i -0.02 m ibias static 5.5 m i 0.12 m i 0.01 m idynamic 5.5 m i 0.12 m i 0.05 m iBoresight(Pitch & Roll) and Yaw Measurement ResultsMeasured Required Measured Required MeasuredAxis Range Position Knowledge KnowledgePitch 255.5 3 pixels 254.780 2 arcsec 1.6 arcsecRoll 255.5 3 pixels 255.385 2 arcsec 1.6 arcsecYaw 0 0:20 ;0:004 10 arcsec 3 arcsec22
Page 3: GLOSSARYATBDBDCCDCRFCRSDMTEKFFOAMFO
Page 11: Chapter 2FUNDAMENTALS OFATTITUDE DE
Page 14 and 15: Rigorous satisfaction of a set of l
Page 16 and 17: lead to the attitude dierential equ
Page 18 and 19: To take advantage of multiple unit
Page 20 and 21: ppstarz SCF(boresightdirection)66op
Page 25 and 26: Start?ReadStar Catalog?Input Initia
Page 27 and 28: Table 3.3: Some noise characteristi
Page 29 and 30: 3.2.1 Gyro ModelFarrenkopf's gyro m
Page 31 and 32: Table 3.4: Probability of the numbe
Page 33 and 34: the Sun, ~v, by [52], = j~vjcsin (
Page 35 and 36: 4.1 Pattern Matching Algorithm4.1.1
Page 37 and 38: 0 17(9)5(7)1(11)180 . . .-CC CW25(
Page 39 and 40: . If these conditions are satised,
Page 41 and 42: ....* 30 *400base lineAAAAAAAAAAU*
Page 43 and 44: third star is considered in a posit
Page 45 and 46: Star Tracker FOVat t i+1at t i+1obs
Page 47 and 48: the unique identication. If no star
Page 49 and 50: Declination(a)α 0-∆αα 0+∆αR
Page 51 and 52: The B-matrix is very important sinc
Page 53 and 54: The square roots of the diagonal co
Page 55 and 56: The benet of the FOAM over the SVD
Page 57 and 58: subject to(t k;1 t k;1 ) = I 33 (5.
Page 59 and 60: where ~v k is a discrete white Gaus
Page 61 and 62: Figure 5.1: QUEST angle errors in a
Page 63 and 64: Table 5.2: SFAD computation time ob
Page 65 and 66: Figure 5.5: Angle errors from batch
Page 67 and 68: Figure 5.8: True errors versus rms
Page 69 and 70: Star Field6LRCLaser Reference Camer
Page 71 and 72: Star TrackerAAAAAAAA Astar A Ab AAA
Page 73 and 74:
Figure 6.5: Pointing determination
Page 75 and 76:
LRSLPAFigure 6.7: Projection of LPA
Page 77 and 78:
A(t), needs to be known at a 40 Hz
Page 79 and 80:
starspacecraftV = V earth+ V s/cV =
Page 81 and 82:
simulation can be applied for the e
Page 83 and 84:
Chapter 7IMPLEMENTATIONCONSIDERATIO
Page 85 and 86:
with the real time determination. T
Page 87 and 88:
Bibliography[1] European Space Agen
Page 89 and 90:
[31] B.E. Schutz. Spaceborne Laser
Page 91 and 92:
ACKNOWLEDGMENTSThe authors would li
Page 93 and 94:
where C ij is a matrix componentini
show all

(GLAS) PRECISION ATTITUDE DETERMINATION - Center for ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?