nav package#

Submodules#

nav.atmosphere module#

nav.ephemeris module#

ephemeris.py

file	sturdr/nav/ephemeris.py
brief	Satellite ephemeris navigation module.
date	October 2024
refs	“IS-GPS-200N”, 2022 “A Software-Defined GPS and Galileo Receiver: A Single-Frequency Approach”, 2007 Borre, Akos, Bertelsen, Rinder, Jensen

nav.ephemeris.CheckTime(t)#

class nav.ephemeris.KeplerianEphemeris#

Bases: object

Attributes:

af0
af1
af2
cic
cis
crc
crs
cuc
cus
deltan
e
health
i0
iDot
iodc
iode
m0
omega
omega0
omegaDot
sqrtA
tgd
toc
toe
ura

Methods

`GetNavStates`(TOW[, calc_accel])	Calculates satellite position, velocity, and acceleration given Keplerian ephemeris elements.
`UpdateParameters`(**kwargs)	Updates the set of ephemeris parameters based on user inputs

GetNavStates(TOW: float64, calc_accel: bool = False)#

Calculates satellite position, velocity, and acceleration given Keplerian ephemeris elements.

Parameters:

TOWnp.double: Current time of week of measurements [s]
calc_accelbool, optional: Should acceleration be calculated?, by default False

Returns:

posnp.ndarray: Satellite position [m]
velnp.ndarray: Satellite velocity [m]
accnp.ndarray: Satellite acceleratio [m]

UpdateParameters(**kwargs)#

Updates the set of ephemeris parameters based on user inputs

Raises:

ValueError: Invalid Keplerian Ephemeris parameter

af0: float64#

af1: float64#

af2: float64#

cic: float64#

cis: float64#

crc: float64#

crs: float64#

cuc: float64#

cus: float64#

deltan: float64#

e: float64#

health: float64#

i0: float64#

iDot: float64#

iodc: float64#

iode: float64#

m0: float64#

omega: float64#

omega0: float64#

omegaDot: float64#

sqrtA: float64#

tgd: float64#

toc: float64#

toe: float64#

ura: float64#

nav.gps_lnav module#

gps_lnav.py

file	sturdr/nav/gps_lnav.py
brief	Implementation of channel.py for GPS L1 C/A signals.
date	October 2024
refs	“IS-GPS-200N”, 2022 “Global Positioning System: Signals, Measurements, and Performance”, 2nd Edition, 2006 Misra & Enge “A Software-Defined GPS and Galileo Receiver: A Single-Frequency Approach”, 2007 Borre, Akos, Bertelsen, Rinder, Jensen

class nav.gps_lnav.GpsLnavParser#

Bases: KeplerianEphemeris