STAR JITTER MODULE (BETA)

Zemax File:

C:/Users/mfalahat/OneDrive - Synopsys, Inc/MyComputer/Archive/Jitter/CubeSat/3-16-2026/CubeSat_Design_SEQ.zmx

Input PSD:

C:/Users/mfalahat/OneDrive - Synopsys, Inc/MyComputer/Archive/Jitter/CubeSat/3-16-2026/worst_case_30_300hz_torque_psd_1000pts.csv

STAR Data:

C:/Users/mfalahat/OneDrive - Synopsys, Inc/MyComputer/Archive/Jitter/CubeSat/3-16-2026/Optic_Results

Integration Time:

5 ms

Module Version:

1.0.1

Wavelength #:

Wavelength:

0.5876 μm

Field #:

Effective Focal Length:

685.000 mm

Jitter RMS (Image Space):

4.344 μm

Notes: No data or information from this tool or report is shared with Synopsys or externally. All data remains local. The primary wavelength was used for this analysis shown in the parameter table. The on-axis field was determined automatically (X = 0, Y = 0), and was the basis for the calculation.

Results

Calculation

The random vibration amplitudes vary randomly with time. Random variables are typically assumed to follow a Gaussian distribution. Output PSD is a function of system frequency response.
The jitter RMS is the square-root of the integral of a weighting function times the response PSD.
The effects of integration time (T) on the line of sight (LOS) jitter depend on the frequency of the image motion relative to the time of integration. Multiplying the LOS PSD by a weighting function accounts for the effects of integration time on low-frequency motion.
The final system MTF is the product of the nominal MTF times the random jitter MTF.
The random jitter MTF can be found when accounting for the RMS deviation caused by the jitter.