Laser Satellite Pointing Jitter Loss Calculator

Spacecraft Optical Terminals: Calculate pointing jitter loss, static boresight mispointing error, Gaussian beam roll-off, and Fine Steering Mirror (FSM) tracking margins.

Beam Geometry & Jitter Mechanics

Laser Wavelength $\lambda$ (nm):

Tx Aperture Diameter $D$ (cm):

1-Sigma Radial Jitter $\sigma_\theta$ (µrad):

Boresight Bias Offset $\theta_{\text{bias}}$ (µrad):

Propagation Distance $Z$ (km):

Tracking Loop Bandwidth (Hz):

Pointing Loss & Alignment Budget

Total Pointing Loss ($L_p$)

-- dB

Transmitted Power On-Target: -- %

Beam Half-Angle Divergence

-- µrad

Beam Radius at Target: -- m

Jitter Fraction ($\sigma_\theta / \theta_{\text{div}}$)

Jitter: -- dB | Bias: -- dB

3-dB Outage Burst Probability

-- %

Target Physical Walkout: ±-- m

Fine Pointing Rule of Thumb:

• To keep pointing loss below $1.0$ dB, total 1-sigma jitter must remain $\le 15\%$ of beamwidth.

• High-bandwidth Fine Steering Mirrors (FSMs) compensate for spacecraft reaction wheel micro-vibrations.

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Laser Satellite Pointing Jitter Loss Calculator

Beam Geometry & Jitter Mechanics

Pointing Loss & Alignment Budget

Frequently Asked Questions