LOGO.049 FGS 2R2 (SN 2004) RESULTS FROM AMA MOVE 2 AND RECOMMENDATION FOR AMA MOVE 3 June 6, 2009 right attitude/right approach/right alongside www.goodrich.com 1 LOGO.049 AGENDA for FGS 2R2 AMA Move Results from post – mirror move 2 analyses FFOV S-curves and field dependence Final mirror move 2 LOGO.049 Results from Post-Mirror Move Analysis The AMA move of 2009.153:21 Move the X axis pupil to the face of the Koester’s by +0.1 mm Move the Y axis pupil to the face of the Koester’s by +1.0 mm The AMA move of 2009.156:09 Move the X axis pupil to the face of the Koester’s by +0 mm Move the Y axis pupil to the face of the Koester’s by -0.3 mm Analytical methods Resulting S-curves were fit to a database of decentered S-curves Resulting S-curves were fit to a Levenberg-Marquardt LSF routine Data were compared for consistency 3 LOGO.049 Results from Post-Mirror Move Analysis ITS change in position indicates the AMA moves as planned. X (asec) Y (asec) 2009:154:00:20:25.698 -406.621 532.198 2009:156:14:40:14.952 -406.535 527.393 Delx Dely Delx Dely measured measured predicted predicted (asec) (asec) (asec) (asec) 0.086 -4.805 0 -4.56 4 LOGO.049 Results from Post-Mirror Move Analysis • Computed decenters resulting from the first AMA move Test File Name SCFitter X decenter Pos Mv Xcor X decenter SCFitter Y decenter Xcor Y decenter (mm) (mm) (mm) (mm) 4 scpos1f_956 1 9.56 -0.1222 -0.1 0.3153 0.4 6 scpos8f_956 8 9.56 -0.0895 -0.1 0.2801 0.3 8 scpos5f_956 5 9.56 -0.0261 0.0 0.4223 0.6 10 scpos1f_931 1 9.31 -0.0743 -0.1 0.3287 0.4 12 scpos8f_931 8 9.31 -0.0899 -0.1 0.3035 0.4 14 scpos5f_931 5 9.31 -0.0228 0.0 0.3947 0.6 16 scpos1f_1045 1 10.45 -0.0692 -0.1 0.3126 0.4 18 scpos8f_1045 8 10.45 -0.0533 -0.1 0.2772 0.4 20 scpos5f_1045 5 10.45 -0.0118 0.0 0.4202 0.6 Indicates good agreement • Position 8 decenters: X = -0.1 mm, Y = 0.3 to 0.4 mm 5 LOGO.049 Results from Second Mirror Move Analysis • Computed decenters resulting from the second AMA move Test File Name Pos Mv SCFitter X decenter Xcor X decenter SCFitter Y decenter Xcor Y decenter 4 scpos1f_956 1 9.56 -0.10 -0.1 0.01 0 to -0.1 6 scpos8f_956 8 9.56 -0.08 -0.1 -0.10 -0.1 8 scpos5f_956 5 9.56 0.04 0 to 0.1 0.01 to -0.049 0 10 scpos1f_931 1 9.31 12 scpos8f_931 8 9.31 14 scpos5f_931 5 9.31 16 scpos1f_1045 1 10.45 18 scpos8f_1045 8 10.45 20 scpos5f_1045 5 10.45 Indicates good agreement with both methods • Position 8 decenters: X = -0.1 mm, Y = -0.1 mm 6 LOGO.049 Results from Second Mirror Move Analysis • Computed Peak-to-Peak resulting from the second AMA move 7 LOGO.049 Results from Second Mirror Move Analysis • Full Aperture X 8 LOGO.049 Results from Second Mirror Move Analysis • Full Aperture Y 9 LOGO.049 Results from Second Mirror Move Analysis • 2/3 Aperture (Pupil) X 10 LOGO.049 Results from Second Mirror Move Analysis • 2/3 Aperture (Pupil) Y 11 LOGO.049 Full FOV Test Set S-curves in Y 12 LOGO.049 Full FOV Test Set S-curves in Y 13 LOGO.049 FOV Review 2003 Full FOV Test POS 1 2 3 4 5 8 X decenter (mm) 0.07 0.04 -0.01 -0.05 -0.03 -0.02 Y decenter (mm) -0.01 -0.05 -0.15 -0.02 0.08 -0.03 2003 Full FOV Test POS 1 2 3 4 5 8 X decenter (mm) 0.07 0.04 -0.01 -0.05 -0.03 -0.02 Y decenter (mm) -0.01 -0.05 -0.15 -0.02 0.08 -0.03 Proposed decenter move of -0.3 mm move in Y only results in a pedicted -0.1 mm decenter at position 8 X decenter (mm) Y decenter (mm) -0.08 -0.12 -0.22 -0.09 0.01 -0.10 Propose no additional move in X use current decenter -0.09 mm X decenter (mm) 0.00 -0.03 -0.08 -0.12 -0.10 -0.09 Y decenter (mm) Actual decenter of -0.1 mm in Y at position 8 X decenter (mm) Y decenter (mm) 0.01 0.00 -0.10 Actual decenter of -0.08 mm in X at position 8 X decenter (mm) -0.1 Y decenter (mm) There are differences between actual and predicted decenters wrt position 8 In part this may be due to uncertainties in S-curve morphology near the pupil centers on the Koester’s prism. -0.04 -0.08 14 LOGO.049 Summary Second move used pos 8 for optimization: Move -0.3 mm in Y only M1 = -12 steps and M2 = + 12 Steps Resulting S-curves improved and field dependent decenter is much improved in this FGS (over the three position measured). Final field dependence will be determined with the 15 POL The predicted field decenters are somewhat inconsistent with predictions from ground observations. FGS SN 2004 is ready for use as a guider. Recommend optimizing position 8 with a final small move. Move X +0.1 mm and Y +0.1 mm to correct for the decenter Move M1 + 8 steps and M2 0 steps 15