"""
Back-Projection Algorithm implementations.

This module contains implementations of back-projection algorithms
for SAR focusing, including time-domain and frequency-domain approaches.
"""

# Placeholder for back-projection implementations
def time_domain_backprojection():
    """Time-domain back-projection algorithm."""
    pass

def frequency_domain_backprojection():
    """Frequency-domain back-projection algorithm."""
    pass

__all__ = [
    'time_domain_backprojection',
    'frequency_domain_backprojection',
]
