feat: Add particle data spectrogram calculations#16
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Implement comprehensive spectrogram computation functions for particle distribution data, including energy, angular (theta/phi), pitch angle, and gyrophase spectrograms. Key features: - energy_spectrogram: omnidirectional flux vs energy/time - theta_spectrogram, phi_spectrogram: angular distributions - pitch_angle_spectrogram: pitch angle vs time (requires B field) - gyrophase_spectrogram: gyrophase vs time (requires B field) Implementation based on SPEDAS/pyspedas conventions: - Proper solid angle weighting using omega weights - Coordinate system matching SPEDAS (-90° to 90° latitude) - Support for multiple aggregation methods (mean, sum, median) - Handles 3-D and 4-D (time-varying) particle data - NaN/Inf handling for data quality Includes comprehensive design documentation (SPECTROGRAMS_DESIGN.md) detailing implementation choices, comparison with pyspedas, and areas for future improvement. https://claude.ai/code/session_012goCfsUEBvmMF5Y8fSWoPU
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Implement comprehensive spectrogram computation functions for particle distribution data, including energy, angular (theta/phi), pitch angle, and gyrophase spectrograms.
Key features:
Implementation based on SPEDAS/pyspedas conventions:
Includes comprehensive design documentation (SPECTROGRAMS_DESIGN.md) detailing implementation choices, comparison with pyspedas, and areas for future improvement.
https://claude.ai/code/session_012goCfsUEBvmMF5Y8fSWoPU