Time-Domain and Monostatic-like Frequency-Domain Methods for Bistatic SAR Simulation.

Area of Science:

• Remote Sensing
• Electromagnetics
• Signal Processing

Background:

• Growing interest in bistatic SAR for enhanced performance and data retrieval.
• Need for reliable simulation tools for mission planning and algorithm verification.

Purpose of the Study:

• Present a time-domain simulator for generic bistatic SAR configurations.
• Derive Transfer Functions for translational invariant and one-stationary SAR geometries.
• Compare time-domain and frequency-domain simulation results.

Main Methods:

• Development of a time-domain simulator for bistatic SAR.
• Derivation of Transfer Functions for specific bistatic configurations.
• Comparison of raw signals from time-domain and frequency-domain simulations.

Main Results:

• The derived Transfer Functions for bistatic SAR are formally equivalent to monostatic SAR.
• A time-domain simulator provides accurate raw signal simulations for bistatic SAR.
• Phase differences between time-domain and frequency-domain simulations are generally small (under 10 degrees).

Conclusions:

• The developed time-domain simulator is a valuable tool for bistatic SAR applications.
• Monostatic SAR simulators can be adapted for specific bistatic configurations.
• The simulation approach is accurate for practical Formation-Flying SAR applications.