This is an update to the calibration performed on June 25 2012. The TMS offsets have changed significantly since the previous calibration. Also note that the channel name for PD1 has changed from CHAN_30 to CHAN_26.
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PD3 = CHAN_28 (P,Y) = (-10133, -7649) |
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PD1 = CHAN_26 (P,Y) = (-79733, 7371) |
PD2 = CHAN_29 (P,Y) = (-79933, -7609) |
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PD4 = CHAN_27 (P,Y) = (-42586, -7448) |
For PIT, PD3 and PD2 are separated by about 6.25 in and 21600 counts. The corresponding calibration is 6.25*25.4e-3/4000/21600 = 1.84 nrad/ct.
Also for PIT, PD4 and PD4 are separated by about 11 in and 37100 counts. The corresponding calibration is 11*25.4e-3/4000/37100 = 1.88 nrad/ct.
For YAW, PD2 and PD1 are separated by about 11 in and 14980 counts. The corresponding calibration is 11*25.4e-3/4000/14980 = 4.66 nrad/ct.
Range is calculated using +-131072 cts in the TMS pointing range.
| PIT | YAW | |
| Calibration |
1.86 nrad/ct Positive pitch lowers the beam. |
4.66 nrad/ct Positive pitch moves the beam to the left (PD2 > PD1 direction). |
| Range | +-0.243e-3 rad | +-0.610e-3 rad |