Todo List

Member calc_loop_gains (float bw, float zeta, float k, float loop_freq, float *pgain, float *igain)

This math is all wrong, these slides show the analysis we want: http://www.compdsp.com/presentations/Jacobsen/abineau_dpll_analysis.pdf

Member calc_navigation_measurement_ (u8 n_channels, channel_measurement_t *meas[], navigation_measurement_t *nav_meas[], double nav_time, ephemeris_t *ephemerides[])

Handle GPS time properly here, e.g. week rollover

Member comp_tl_update (comp_tl_state_t *s, correlation_t cs[3])

Write proper documentation with math and diagram.

Member costas_discriminator (float I, float Q)

Fix potential divide by zero if Q is zero.

Member GPS_NUM_SATS

These constants don't belong in this file.

Member GPS_WEEK_CYCLE

Detect and handle rollover more gracefully.