Module: cssComm

This module is responsible for correcting the raw CSS output values to the expected cosine values. This requires a pre-calibrated Chebyshev residual model which calculates the expected deviation from the expected CSS cosine output given a raw CSS measurement at a given distance from the sun. More information on can be found in the PDF Description.

Defines

MAX_NUM_CHEBY_POLYS

Functions

void SelfInit_cssProcessTelem(CSSConfigData *configData, int64_t moduleID)

This method initializes the configData for theCSS sensor interface. It checks to ensure that the inputs are sane and then creates the output message

Return

void

Parameters

  • configData: The configuration data associated with the CSS sensor interface

void CrossInit_cssProcessTelem(CSSConfigData *configData, int64_t moduleID)

This method performs the second stage of initialization for the CSS sensor interface. It’s primary function is to link the input messages that were created elsewhere.

Return

void

Parameters

  • configData: The configuration data associated with the CSS interface

void Update_cssProcessTelem(CSSConfigData *configData, uint64_t callTime, int64_t moduleID)

This method takes the raw sensor data from the coarse sun sensors and converts that information to the format used by the CSS nav.

Return

void

Parameters

  • configData: The configuration data associated with the CSS interface

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

void Reset_cssProcessTelem(CSSConfigData *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 guidance module

struct CSSConfigData
#include <cssComm.h>

Top level structure for the CSS sensor interface system. Contains all parameters for the CSS interface.

Public Members

uint32_t NumSensors

The number of sensors we are processing.

char SensorListName[MAX_STAT_MSG_LENGTH]

The message name that contains CSS data.

char OutputDataName[MAX_STAT_MSG_LENGTH]

The name of the output message.

int32_t SensorMsgID

Sensor ID tied to the sensor data name.

int32_t OutputMsgID

Message ID for the output port.

CSSArraySensorIntMsg InputValues

Input values we took off the messaging system.

double MaxSensorValue

Scale factor to go from sensor values to cosine.

uint32_t ChebyCount

Count on the number of chebyshev polynominals we have.

double KellyCheby[MAX_NUM_CHEBY_POLYS]

Chebyshev polynominals to fit output to cosine.

BSKLogger *bskLogger

BSK Logging.