Module: sunlineEphem

This module computes an ephemeris-based sunline heading.

More information can be found in the PDF Description

Functions

void SelfInit_sunlineEphem(sunlineEphemConfig *configData, int64_t moduleID)

This method sets up the module output message of type navAttIntMsg

Return

void

Parameters

  • configData: The configuration data associated with this module

  • moduleID: The module identifier

void CrossInit_sunlineEphem(sunlineEphemConfig *configData, int64_t moduleID)

This method performs the second stage of initialization for this module. Its primary function is to link the input messages that were created elsewhere. The required input messages are the sun ephemeris message of type ephemerisIntMsg, the spacecraft translational navigation message of type navTransIntMsg and the spacecraft attitude navigation message of type navAttIntMsg.

Return

void

Parameters

  • configData: The configuration data associated with this module

  • moduleID: The module identifier

void Update_sunlineEphem(sunlineEphemConfig *configData, uint64_t callTime, int64_t moduleID)

Updates the sun heading based on ephemeris data. Returns the heading as a unit vector in the body frame.

Return

void

Parameters

  • configData: The configuration data associated with the module

  • callTime: The clock time at which the function was called (nanoseconds)

  • moduleID: The module identifier

void Reset_sunlineEphem(sunlineEphemConfig *configData, uint64_t callTime, int64_t moduleID)

This method performs a complete reset of the module. Local module variables that retain time varying states between function calls are reset to their default values.

Return

void

Parameters

  • configData: The configuration data associated with the module

  • callTime: The clock time at which the function was called (nanoseconds)

  • moduleID: The module identifier

struct sunlineEphemConfig
#include <sunlineEphem.h>

Top level structure for the sub-module routines.

Public Members

char navStateOutMsgName[MAX_STAT_MSG_LENGTH]

The name of the output message.

char sunPositionInMsgName[MAX_STAT_MSG_LENGTH]

The name of the sun ephemeris input message.

char scPositionInMsgName[MAX_STAT_MSG_LENGTH]

The name of the spacecraft ephemeris input message.

char scAttitudeInMsgName[MAX_STAT_MSG_LENGTH]

The name of the spacecraft attitude input message.

int32_t navStateOutMsgId

[-] ID for the outgoing body estimate message

int32_t sunPositionInMsgId

[-] ID for the incoming CSS sensor message

int32_t scPositionInMsgId

[-] ID for the incoming spacecraft position message

int32_t scAttitudeInMsgId

[-] ID for the incoming spacecraft attitude message

BSKLogger *bskLogger

BSK Logging.