ROPP PP 'occ' calling tree - ROPP v4.0 (December 2009)

ROPP overview document

ROPP PP user guide document

ROPP IO user guide document

ROPP 1dVar user guide document

PRE-PROCESSOR 'invert' module calling tree

PRE-PROCESSOR 'occ' module calling tree

1D FORWARD MODEL module calling tree

2D FORWARD MODEL module calling tree

1DVAR module calling tree

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ropp_pp_occ_ tool						Program to perform processing of L1 and L2 excess phase and amplitude RO data to L1 and L2 bending angle and ionospheric corrected bending angle and refractivity
|__	ropp_pp_read_config					Read configuration parameter file (if exists)
|__	ropp_io_read					Read input observation data
|__	ropp_pp_set_coordinates					Check (and convert) LEO and GPS coordinates in ECEF frame
|	|__	eci2ecf				Convert coordinates from ECI to ECF reference frame
|__	occ_point					Determine occultation point georeference information
|	|__	impact_parameter				Calculate impact parameter by geometric optics
|	|__	cart2geod				Convert Cartesian coordinates to Geodetic coordinates
|	|__	geod2cart				Convert Geodetic coordinates to Cartesian coordinates
|	|__	vector_angle				Compute vector angle between rays
|	|__	curvature				Compute radius of curvature
|	|__	datum_hmsl				Compute undulation (WGS84 ellipsoid to EGM96 geoid)
|__	ropp_pp_preprocess					Mission-specific pre-processing and input data cut-off
|	|__	ropp_pp_preprocess_COSMIC				COSMIC data pre-processing
|	|	|__	GpsSecond			Convert between calendar date and total GPS seconds
|	|__	ropp_pp_modelphase				Compute model excess phase
|	|	|__	ropp_pp_init_polynomial			Generate matrix of polynomials
|	|	|__	ropp_pp_regression			Linear regression fit excess phase
|	|	|__	ropp_pp_polynomial			Polynomial expansion - excess phase as function of time
|	|	|__	impact_parameter			Calculate impact parameter
|	|	|__	ropp_pp_refrac_MSIS			Calculate climatological refractivity profile
|	|	|	|__	ropp_pp_read_MSIS		Read file of MSIS spherical harmonic coefficients
|	|	|__	ropp_pp_tdry			Calculate dry temperature and pressure
|	|	|__	ropp_pp_abel			Abel transform to MSIS bending angle profile
|	|	|__	ropp_pp_bangle2phase			Compute model phase from MSIS bending angles
|	|	|	|__	ropp_pp_init_polynomial		Generate matrix of polynomials
|	|	|	|__	ropp_pp_regression		Linear regression best fit
|	|	|	|__	ropp_pp_interpolate_trajectory		Calculate interpolated coordinates and velocities
|	|	|	|__	ropp_pp_impact2doppler		Compute relative doppler shift
|	|	|	|__	ropp_pp_interpol		Linear interpolation
|	|__	ropp_pp_openloop				Open loop data processing
|	|	|__	impact_parameter			Calculate impact parameter
|	|__	ropp_pp_cutoff				Cutoff data based on configurable parameters
|	|	|__	impact_parameter			Calculate impact parameter
|	|	|__	ropp_pp_bending_angle_go			Calculate geometric optics bending angle
|	|	|	|__	ropp_pp_basic_splines		Generate matrix of basic polynomials
|	|	|	|__	ropp_pp_quasi_invert		Quasi-inverse of a matrix
|	|	|	|__	ropp_pp_init_spline		Calculate spline 2nd derivative
|	|	|	|__	ropp_pp_interpol_spline		Spline interpolation
|	|	|	|__	ropp_pp_filter		Filter signal by optimal estimation
|	|	|	|__	ropp_pp_sliding_polynomial		Filter signal by sliding polynomial fit
|	|	|	|__	ropp_pp_interpol		Linear interpolation
|	|	|	|__	ropp_pp_satellite_velocities		Calculate satellite velocities by poly regress
|	|	|	|__	ropp_pp_geometric_optics		Calculate bending angle from rel doppler shift
|	|	|__	ropp_io_shrink			Select data subset
|	|	|__	ropp_pp_monotonous			Sort L1 and L2 impact parameters
|	|	|__	ropp_io_shrink			Select data subset
|	|__	ropp_pp_spectra				Calculate spectra
|	|	|__	ropp_pp_FFT			Fast Fourier Transform signal
|	|__	ropp_pp_amplitude_go				Compute L2 amplitude by geometric optics
|	|	|__	ropp_pp_satellite_velocities			Calculate satellite velocities by poly regress
|	|	|__	ropp_pp_sliding_polynomial			Least-square fit polynomial
|	|	|__	ropp_pp_interpol			Linear interpolation
|	|__	ropp_pp_correct_L2				Correct degraded L2 excess phase and amplitude data
|	|	|__	ropp_pp_satellite_velocities			Calculate satellite velocities by poly regress
|	|	|__	ropp_pp_radioholographic_filter			Radioholographic filtering of RO signal
|	|	|	|__	ropp_pp_satellite_velocities		Calculate satellite velocities by regress
|	|	|	|__	ropp_pp_radiooptic_analysis		Calculate local spatial spectra
|	|	|	|__	ropp_pp_impact2doppler		Calculate relative doppler shift
|	|	|	|__	ropp_pp_fourier_filter		Gaussian filter in spectral space
|	|	|__	ropp_pp_radiooptic_analysis			Calculate local spatial spectra
|	|	|	|__	plane_coordinates		Calculate occultation plane coords
|	|	|	|__	ropp_pp_init_polynomial		Generate matrix of polynomials
|	|	|	|__	ropp_pp_regression		Linear regression best fit
|	|	|	|__	ropp_pp_interpolate_trajectory		Calculate interpolated coordinates and velocities
|	|	|	|__	ropp_pp_geometric_optics		Calculate bending angle from doppler
|	|	|	|__	ropp_pp_FFT		Fast Fourier Transform
|	|	|__	ropp_pp_sliding_polynomial			Least-square fit polynomial
|	|	|__	ropp_pp_interpol			Linear interpolation
|	|	|__	ropp_pp_impact2doppler			Compute relative doppler shift
|	|	|__	ropp_pp_bangle2phase			Compute excess phase
|	|__	impact_parameter				Calculate impact parameter by geometric optics
|__	ropp_io_init					Initialise bending angle data structures
|__	impact_parameter					Calculate output impact parameter grid
|__	ropp_pp_bending_angle_go					Compute smoothed bending angle profile by geometric optics
|	|__	ropp_pp_basic_splines				Generate matrix of basic polynomials
|	|__	ropp_pp_quasi_invert				Quasi-inverse of a matrix
|	|__	ropp_pp_init_spline				Calculate spline 2nd derivative
|	|__	ropp_pp_interpol_spline				Spline interpolation
|	|__	ropp_pp_filter				Filter signal by optimal estimation
|	|__	ropp_pp_sliding_polynomial				Filter signal by sliding polynomial fit
|	|__	ropp_pp_interpol				Linear interpolation
|	|__	ropp_pp_satellite_velocities				Calculate satellite velocities by regress
|	|__	ropp_pp_geometric_optics				Calculate bending angle from rel doppler
|__	ropp_pp_linear_combination					Compute raw ionospheric corrected b.a.
|__	ropp_pp_bending_angle_go					Compute bending angle profile by geometric optics
|	|__	ropp_pp_basic_splines				Generate matrix of basic polynomials
|	|__	ropp_pp_quasi_invert				Quasi-inverse of a matrix
|	|__	ropp_pp_init_spline				Calculate spline 2nd derivative
|	|__	ropp_pp_interpol_spline				Spline interpolation
|	|__	ropp_pp_filter				Filter signal by optimal estimation
|	|__	ropp_pp_sliding_polynomial				Filter signal by sliding polynomial fit
|	|__	ropp_pp_interpol				Linear interpolation
|	|__	ropp_pp_satellite_velocities				Calculate satellite velocities by regress
|	|__	ropp_pp_geometric_optics				Calculate bending angle from rel doppler
|__	ropp_pp_bending_angle_wo					Compute bending angle profile by wave optics
|	|__	ropp_pp_monotonous				Sort L1 and L2 impact parameters
|	|__	ropp_pp_DCT				Canonical transform processing
|	|	|__	ropp_pp_satellite_velocities			Calculate satellite velocities by regress
|	|	|__	ropp_pp_sliding_polynomial			Filter signal by sliding polynomial
|	|	|__	ropp_pp_interpol			Linear interpolation
|	|	|__	ropp_pp_geometric_optics_adj			Compute gradients of impact and bending
|	|	|__	ropp_pp_interpol			Linear interpolation
|	|	|__	ropp_pp_FFT			Fast Fourier transformed signal
|	|	|__	ropp_pp_filter			Filter phase by optimal estimation
|	|	|__	ropp_pp_sliding_polynomial			Filter phase by sliding poly
|	|	|__	ropp_pp_fourier_filter			Fourier filter complex field
|	|	|__	ropp_pp_FFT			Fast Fourier transformed signal
|	|	|__	ropp_pp_polynomial			Polynomial expansion
|	|	|__	ropp_pp_geometric_optics			Compute bending angle by geometric optics
|	|	|__	ropp_pp_interpol			Linear interpolation
|__	ropp_pp_monotonous					Sort L1 and L2 impact parameters
|__	ropp_pp_linear_combination					Perform ionospheric correction by linear combination - raw unoptimised bending angle.
|__	ropp_io_init					Initialise refractivity and bending angle data structures to contain observed data on standard grid
|__	ropp_pp_merge_profile					Interpolate data onto a standard output grid
|	|__	ropp_pp_interpol				Linear interpolation of data
|__	ropp_pp_linear_combination					Perform ionospheric correction by linear combination (if requested - set config%method="NONE").
|__	ropp_pp_search_model_refraction					Retrieve best-fit MSIS model bending angle profile (config%method="GMSIS")
|	|__	ropp_pp_interpol				Linear interpolation of data
|	|__	ropp_pp_bangle_MSIS				Calculate climatological bending angle profile for each month, lat, lon
|	|	|__	ropp_pp_read_MSIS			Read file of MSIS climatology spherical harmonic coefficients
|	|	|	|__	ncdf_open		Open netcdf file
|	|	|	|__	ncdf_getsize		Obtain variable dimensions
|	|	|	|__	ncdf_getvar		Read data
|	|__	ropp_pp_regression				Linear regression fit observations to MSIS bending angle profile
|	|	|__	ropp_pp_quasi_invert			Quasi-inverse of a matrix
|	|	|	|__	ropp_pp_invert_matrix		Invert matrix
|__	ropp_pp_model_refraction					Retrieve local MSIS model bending angle profile (config%method="MSIS")
|	|__	ropp_pp_refrac_MSIS				Calculate climatological refractivity profile for given month, lat, lon
|	|	|__	ropp_pp_read_MSIS			Read file of MSIS climatology spherical harmonic coefficients
|	|	|	|__	ncdf_open		Open netcdf file
|	|	|	|__	ncdf_getsize		Obtain variable dimensions
|	|	|	|__	ncdf_getvar		Read data
|	|__	ropp_pp_abel				Compute bending angle profile from refrac (LIN or EXP)
|__	ropp_pp_fit_model_refraction					Fit model to smoothed bending angle profile
|	|__	ropp_pp_interpol_log				Interpolate L1 bending angles to model grid
|	|__	ropp_pp_linear_combination				Rough ionospheric correction - linear comb L1 and L2 BA
|__	ropp_pp_ionospheric_correction					Ionospheric correction with statistical optimisation
|	|__	ropp_pp_interpol				Interpolate L1, L2 and model BA to homogeneous grid
|	|__	ropp_pp_filter				Smooth bending angles by optimal estimation filtering
|	|	|__	ropp_pp_quasi_invert			Quasi-inverse of a matrix
|	|	|	|__	ropp_pp_invert_matrix		Invert matrix
|	|__	ropp_pp_sliding_polynomial				Smooth bending angles by sliding polynomial filtering
|	|	|__	ropp_pp_regression			Linear regression fit observations to MSIS bending angle profile
|	|	|	|__	ropp_pp_quasi_invert		Quasi-inverse of a matrix
|	|__	ropp_pp_invert_matrix				Invert matrix
|	|__	ropp_pp_interpol				Interpolate neutral BA to L1 impact parameters
|__	ropp_pp_invert					Invert corrected BA profile to refractivity (LIN or EXP, if requested - set config%method="NONE")
|__	ropp_pp_invert_refraction					Invert corrected BA profile to refractivity using MSIS climatology to extend BA profile (method="MSIS")
|	|__	ropp_pp_model_refraction				Retrieve MSIS model BA profile above observations
|	|	|__	ropp_pp_refrac_MSIS			Calculate climatological refractivity profile
|	|	|	|__	ropp_pp_read_MSIS		Read file of MSIS spherical harmonic coefficients
|	|__	ropp_pp_invert				Invert corrected BA with MSIS profile to refractivity (LIN or EXP)
|__	ropp_io_roprof2roprof					Copy retrieved profiles to RO data structure
|__	ropp_io_write					Write output to ROPP format netCDF