System

include/rid/system.h System message handling per ASTM F3411-22a.

Example usage: 

    rid_system_t system;

    rid_system_init(&system);

    rid_system_set_operator_location_type(&system, RID_OPERATOR_LOCATION_TYPE_TAKEOFF);
    rid_system_set_classification_type(&system, RID_CLASSIFICATION_TYPE_EUROPEAN_UNION);
    rid_system_set_ua_classification_category(&system, RID_UA_CLASSIFICATION_CATEGORY_OPEN);
    rid_system_set_ua_classification_class(&system, RID_UA_CLASSIFICATION_CLASS_1);

    rid_system_set_operator_coordinates(&system, 60.2870324, 24.5397187);
    rid_system_set_operator_altitude(&system, 50.0f);

    rid_system_set_area_count(&system, 1);
    rid_system_set_area_radius(&system, 100);
    rid_system_set_area_ceiling(&system, 120.0f);
    rid_system_set_area_floor(&system, 0.0f);

    rid_system_set_timestamp(&system, 3600);

    hexdump(&system, sizeof(system));

    printf("Protocol version:   %u\n", rid_message_get_protocol_version(&system));
    printf("Message type:       %u\n", rid_message_get_type(&system));
    printf("Operator loc type:  %u\n", rid_system_get_operator_location_type(&system));
    printf("Classification:     %u\n", rid_system_get_classification_type(&system));
    printf("Operator latitude:  %.6f\n", rid_system_get_operator_latitude(&system));
    printf("Operator longitude: %.6f\n", rid_system_get_operator_longitude(&system));
    printf("Area count:         %u\n", rid_system_get_area_count(&system));
    printf("Area radius:        %u m\n", rid_system_get_area_radius(&system));
    printf("Area ceiling:       %.1f m\n", (double)rid_system_get_area_ceiling(&system));
    printf("Area floor:         %.1f m\n", (double)rid_system_get_area_floor(&system));
    printf("UA class:           %u\n", rid_system_get_ua_classification_class(&system));
    printf("UA category:        %u\n", rid_system_get_ua_classification_category(&system));
    printf("Operator altitude:  %.1f m\n", (double)rid_system_get_operator_altitude(&system));
    printf("Timestamp:          %u\n", rid_system_get_timestamp(&system));
    printf("Unixtime:           %u\n", rid_system_get_unixtime(&system));

Structures and Types

Type Name
enum rid_classification_type_t
Classification type per ASTM F3411-22a.
enum rid_operator_location_type_t
Operator location type per ASTM F3411-22a.
struct rid_system_t
System message structure per ASTM F3411-22a.
enum rid_ua_classification_category_t
UA classification category per ASTM F3411-22a.
enum rid_ua_classification_class_t
UA classification class per ASTM F3411-22a.

Functions

Type Name
const char * rid_classification_type_to_string (rid_classification_type_t type)
Convert classification type to string representation.
const char * rid_operator_location_type_to_string (rid_operator_location_type_t type)
Convert operator location type to string representation.
float rid_system_get_area_ceiling (const rid_system_t *system)
Get the area ceiling from a System message.
uint16_t rid_system_get_area_count (const rid_system_t *system)
Get the area count from a System message.
float rid_system_get_area_floor (const rid_system_t *system)
Get the area floor from a System message.
uint16_t rid_system_get_area_radius (const rid_system_t *system)
Get the area radius from a System message.
rid_classification_type_t rid_system_get_classification_type (const rid_system_t *system)
Get the classification type from a System message.
float rid_system_get_operator_altitude (const rid_system_t *system)
Get the operator altitude from a System message.
double rid_system_get_operator_latitude (const rid_system_t *system)
Get the operator latitude from a System message.
rid_operator_location_type_t rid_system_get_operator_location_type (const rid_system_t *system)
Get the operator location type from a System message.
double rid_system_get_operator_longitude (const rid_system_t *system)
Get the operator longitude from a System message.
uint32_t rid_system_get_timestamp (const rid_system_t *system)
Get the timestamp from a System message.
rid_ua_classification_category_t rid_system_get_ua_classification_category (const rid_system_t *system)
Get the UA classification category from a System message.
rid_ua_classification_class_t rid_system_get_ua_classification_class (const rid_system_t *system)
Get the UA classification class from a System message.
uint32_t rid_system_get_unixtime (const rid_system_t *system)
Get the timestamp as Unix timestamp.
int rid_system_init (rid_system_t *system)
Initialize a System message with default values.
int rid_system_set_area_ceiling (rid_system_t *system, float altitude)
Set the area ceiling for a System message.
int rid_system_set_area_count (rid_system_t *system, uint16_t count)
Set the area count for a System message.
int rid_system_set_area_floor (rid_system_t *system, float altitude)
Set the area floor for a System message.
int rid_system_set_area_radius (rid_system_t *system, uint16_t meters)
Set the area radius for a System message.
int rid_system_set_classification_type (rid_system_t *system, rid_classification_type_t type)
Set the classification type for a System message.
int rid_system_set_operator_altitude (rid_system_t *system, float altitude)
Set the operator altitude for a System message.
int rid_system_set_operator_coordinates (rid_system_t *system, double latitude, double longitude)
Set the operator latitude and longitude for a System message.
int rid_system_set_operator_location_type (rid_system_t *system, rid_operator_location_type_t type)
Set the operator location type for a System message.
int rid_system_set_timestamp (rid_system_t *system, uint32_t timestamp)
Set the timestamp for a System message.
int rid_system_set_ua_classification_category (rid_system_t *system, rid_ua_classification_category_t category)
Set the UA classification category for a System message.
int rid_system_set_ua_classification_class (rid_system_t *system, rid_ua_classification_class_t class)
Set the UA classification class for a System message.
int rid_system_set_unixtime (rid_system_t *system, uint32_t unixtime)
Set the timestamp for a System message from Unix timestamp.
int rid_system_to_json (const rid_system_t *system, char *buffer, size_t buffer_size, size_t *needed_size)
Format a System message as a JSON string.
int rid_system_validate (const rid_system_t *system)
Validate a System message structure.
const char * rid_ua_classification_category_to_string (rid_ua_classification_category_t category)
Convert UA classification category to string representation.
const char * rid_ua_classification_class_to_string (rid_ua_classification_class_t class)
Convert UA classification class to string representation.

Macros

Type Name
define RID_AREA_CEILING_INVALID -1000.0f
Value indicating invalid area ceiling altitude.
define RID_AREA_CEILING_INVALID_ENCODED 0
Encoded value for invalid area ceiling altitude.
define RID_AREA_CEILING_MAX 31767.0f
Maximum area ceiling altitude in meters.
define RID_AREA_CEILING_MIN -1000.0f
Minimum area ceiling altitude in meters.
define RID_AREA_COUNT_MAX UINT16_MAX
Maximum area count value.
define RID_AREA_FLOOR_INVALID -1000.0f
Value indicating invalid area floor altitude.
define RID_AREA_FLOOR_INVALID_ENCODED 0
Encoded value for invalid area floor altitude.
define RID_AREA_FLOOR_MAX 31767.0f
Maximum area floor altitude in meters.
define RID_AREA_FLOOR_MIN -1000.0f
Minimum area floor altitude in meters.
define RID_AREA_RADIUS_MAX 2550
Maximum area radius in meters.
define RID_OPERATOR_ALTITUDE_INVALID -1000.0f
Value indicating invalid operator altitude.
define RID_OPERATOR_ALTITUDE_INVALID_ENCODED 0
Encoded value for invalid operator altitude.
define RID_OPERATOR_LATITUDE_INVALID DBL_MAX
Value indicating invalid operator latitude.
define RID_OPERATOR_LONGITUDE_INVALID DBL_MAX
Value indicating invalid operator longitude.
define RID_SYSTEM_TIMESTAMP_EPOCH 1546300800
Timestamp epoch (2019-01-01 00:00:00 UTC as Unix timestamp).

Structures and Types Documentation

enum rid_classification_type_t

Classification type per ASTM F3411-22a.

enum rid_classification_type_t {
    RID_CLASSIFICATION_TYPE_UNDECLARED = 0,
    RID_CLASSIFICATION_TYPE_EUROPEAN_UNION = 1,
    RID_CLASSIFICATION_TYPE_MAX = 7
};

enum rid_operator_location_type_t

Operator location type per ASTM F3411-22a.

enum rid_operator_location_type_t {
    RID_OPERATOR_LOCATION_TYPE_TAKEOFF = 0,
    RID_OPERATOR_LOCATION_TYPE_DYNAMIC = 1,
    RID_OPERATOR_LOCATION_TYPE_FIXED = 2,
    RID_OPERATOR_LOCATION_TYPE_MAX = 3
};

struct rid_system_t

System message structure per ASTM F3411-22a.

Variables:

  • uint16_t area_ceiling

  • uint16_t area_count

  • uint16_t area_floor

  • uint8_t area_radius

  • uint8_t classification_type

  • uint8_t message_type

  • uint16_t operator_altitude

  • int32_t operator_latitude

  • uint8_t operator_location_type

  • int32_t operator_longitude

  • uint8_t protocol_version

  • uint8_t reserved_1

  • uint8_t reserved_2

  • uint32_t timestamp

  • uint8_t ua_classification_category

  • uint8_t ua_classification_class

enum rid_ua_classification_category_t

UA classification category per ASTM F3411-22a.

enum rid_ua_classification_category_t {
    RID_UA_CLASSIFICATION_CATEGORY_UNDEFINED = 0,
    RID_UA_CLASSIFICATION_CATEGORY_OPEN = 1,
    RID_UA_CLASSIFICATION_CATEGORY_SPECIFIC = 2,
    RID_UA_CLASSIFICATION_CATEGORY_CERTIFIED = 3,
    RID_UA_CLASSIFICATION_CATEGORY_MAX = 15
};

enum rid_ua_classification_class_t

UA classification class per ASTM F3411-22a.

enum rid_ua_classification_class_t {
    RID_UA_CLASSIFICATION_CLASS_UNDEFINED = 0,
    RID_UA_CLASSIFICATION_CLASS_0 = 1,
    RID_UA_CLASSIFICATION_CLASS_1 = 2,
    RID_UA_CLASSIFICATION_CLASS_2 = 3,
    RID_UA_CLASSIFICATION_CLASS_3 = 4,
    RID_UA_CLASSIFICATION_CLASS_4 = 5,
    RID_UA_CLASSIFICATION_CLASS_5 = 6,
    RID_UA_CLASSIFICATION_CLASS_6 = 7,
    RID_UA_CLASSIFICATION_CLASS_MAX = 15
};

Functions Documentation

function rid_classification_type_to_string

Convert classification type to string representation.

const char * rid_classification_type_to_string (
    rid_classification_type_t type
)

Parameters:

  • type The classification type to convert.

Returns:

String representation of the classification type. Returns "UNKNOWN" for invalid values.

function rid_operator_location_type_to_string

Convert operator location type to string representation.

const char * rid_operator_location_type_to_string (
    rid_operator_location_type_t type
)

Parameters:

  • type The operator location type to convert.

Returns:

String representation of the operator location type. Returns "UNKNOWN" for invalid values.

function rid_system_get_area_ceiling

Get the area ceiling from a System message.

float rid_system_get_area_ceiling (
    const rid_system_t *system
)

Parameters:

  • system Pointer to the System message structure.

Returns:

The ceiling altitude in meters or RID_AREA_CEILING_INVALID when uknnown, including when system is NULL.

function rid_system_get_area_count

Get the area count from a System message.

uint16_t rid_system_get_area_count (
    const rid_system_t *system
)

Parameters:

  • system Pointer to the System message structure.

Returns:

The number of aircraft in the area or 0 if system is NULL.

function rid_system_get_area_floor

Get the area floor from a System message.

float rid_system_get_area_floor (
    const rid_system_t *system
)

Parameters:

  • system Pointer to the System message structure.

Returns:

The floor altitude in meters or RID_AREA_FLOOR_INVALID when unknown, including when system is NULL.

function rid_system_get_area_radius

Get the area radius from a System message.

uint16_t rid_system_get_area_radius (
    const rid_system_t *system
)

Parameters:

  • system Pointer to the System message structure.

Returns:

The radius in meters or 0 if system is NULL.

function rid_system_get_classification_type

Get the classification type from a System message.

rid_classification_type_t rid_system_get_classification_type (
    const rid_system_t *system
)

Parameters:

  • system Pointer to the System message structure.

Returns:

The classification type or RID_CLASSIFICATION_TYPE_UNDECLARED if system is NULL.

function rid_system_get_operator_altitude

Get the operator altitude from a System message.

float rid_system_get_operator_altitude (
    const rid_system_t *system
)

Decodes altitude from encoded uint16_t value per ASTM F3411-22a.

Parameters:

  • system Pointer to the System message structure.

Returns:

Altitude in meters or RID_OPERATOR_ALTITUDE_INVALID when uknown, including when system is NULL.

function rid_system_get_operator_latitude

Get the operator latitude from a System message.

double rid_system_get_operator_latitude (
    const rid_system_t *system
)

Decodes latitude from encoded int32_t value per ASTM F3411-22a.

Parameters:

  • system Pointer to the System message structure.

Returns:

Latitude in degrees or RID_OPERATOR_LATITUDE_INVALID if system is NULL or if both encoded latitude and longitude are 0.

function rid_system_get_operator_location_type

Get the operator location type from a System message.

rid_operator_location_type_t rid_system_get_operator_location_type (
    const rid_system_t *system
)

Parameters:

  • system Pointer to the System message structure.

Returns:

The operator location type or RID_OPERATOR_LOCATION_TYPE_TAKEOFF if system is NULL.

function rid_system_get_operator_longitude

Get the operator longitude from a System message.

double rid_system_get_operator_longitude (
    const rid_system_t *system
)

Decodes longitude from encoded int32_t value per ASTM F3411-22a.

Parameters:

  • system Pointer to the System message structure.

Returns:

Longitude in degrees or RID_OPERATOR_LONGITUDE_INVALID if system is NULL or if both encoded latitude and longitude are 0.

function rid_system_get_timestamp

Get the timestamp from a System message.

uint32_t rid_system_get_timestamp (
    const rid_system_t *system
)

Parameters:

  • system Pointer to the System message structure.

Returns:

Seconds since RID epoch (2019-01-01 00:00:00 UTC) or 0 if system is NULL.

function rid_system_get_ua_classification_category

Get the UA classification category from a System message.

rid_ua_classification_category_t rid_system_get_ua_classification_category (
    const rid_system_t *system
)

Parameters:

  • system Pointer to the System message structure.

Returns:

The UA classification category or RID_UA_CLASSIFICATION_CATEGORY_UNDEFINED if system is NULL.

function rid_system_get_ua_classification_class

Get the UA classification class from a System message.

rid_ua_classification_class_t rid_system_get_ua_classification_class (
    const rid_system_t *system
)

Parameters:

  • system Pointer to the System message structure.

Returns:

The UA classification class or RID_UA_CLASSIFICATION_CLASS_UNDEFINED if system is NULL.

function rid_system_get_unixtime

Get the timestamp as Unix timestamp.

uint32_t rid_system_get_unixtime (
    const rid_system_t *system
)

Get RID timestamp as Unix timestamp.

Parameters:

  • system Pointer to the System message structure.

Returns:

Unix timestamp (seconds since 1970-01-01 00:00:00 UTC) or 0 if system is NULL.

function rid_system_init

Initialize a System message with default values.

int rid_system_init (
    rid_system_t *system
)

Sets protocol version to 2 and message type to SYSTEM. All other fields are set to zero.

Parameters:

  • system Pointer to the System message structure.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.

function rid_system_set_area_ceiling

Set the area ceiling for a System message.

int rid_system_set_area_ceiling (
    rid_system_t *system,
    float altitude
)

Parameters:

  • system Pointer to the System message structure.
  • altitude The ceiling altitude in meters (-1000 to 31767). Use RID_AREA_CEILING_INVALID for invalid/unknown.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.
  • RID_ERROR_OUT_OF_RANGE if altitude is outside valid range.

function rid_system_set_area_count

Set the area count for a System message.

int rid_system_set_area_count (
    rid_system_t *system,
    uint16_t count
)

Parameters:

  • system Pointer to the System message structure.
  • count The number of aircraft in the area.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.

function rid_system_set_area_floor

Set the area floor for a System message.

int rid_system_set_area_floor (
    rid_system_t *system,
    float altitude
)

Parameters:

  • system Pointer to the System message structure.
  • altitude The floor altitude in meters (-1000 to 31767). Use RID_AREA_FLOOR_INVALID for invalid/unknown.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.
  • RID_ERROR_OUT_OF_RANGE if altitude is outside valid range.

function rid_system_set_area_radius

Set the area radius for a System message.

int rid_system_set_area_radius (
    rid_system_t *system,
    uint16_t meters
)

Parameters:

  • system Pointer to the System message structure.
  • meters The radius in meters (0 to 2550, 10m resolution).

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.
  • RID_ERROR_OUT_OF_RANGE if meters exceeds 2550.

function rid_system_set_classification_type

Set the classification type for a System message.

int rid_system_set_classification_type (
    rid_system_t *system,
    rid_classification_type_t type
)

Parameters:

  • system Pointer to the System message structure.
  • type The classification type to set.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.

function rid_system_set_operator_altitude

Set the operator altitude for a System message.

int rid_system_set_operator_altitude (
    rid_system_t *system,
    float altitude
)

Encodes altitude in meters per ASTM F3411-22a ((value + 1000) / 0.5).

Parameters:

  • system Pointer to the System message structure.
  • altitude Altitude in meters (-1000.0 to 31767.0). Use RID_OPERATOR_ALTITUDE_INVALID for invalid/unknown.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.
  • RID_ERROR_OUT_OF_RANGE if altitude is outside valid range.

function rid_system_set_operator_coordinates

Set the operator latitude and longitude for a System message.

int rid_system_set_operator_coordinates (
    rid_system_t *system,
    double latitude,
    double longitude
)

Encodes both values per ASTM F3411-22a. Pass RID_OPERATOR_LATITUDE_INVALID and RID_OPERATOR_LONGITUDE_INVALID together to set the operator position as unknown. A mixed invalid and valid pair is rejected.

Parameters:

  • system Pointer to the System message structure.
  • latitude Latitude in degrees (-90.0 to +90.0) or RID_OPERATOR_LATITUDE_INVALID.
  • longitude Longitude in degrees (-180.0 to +180.0) or RID_OPERATOR_LONGITUDE_INVALID.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.
  • RID_ERROR_INVALID_COMBINATION if only one of latitude or longitude is invalid.
  • RID_ERROR_INVALID_LATITUDE if latitude is outside the valid range.
  • RID_ERROR_INVALID_LONGITUDE if longitude is outside the valid range.

function rid_system_set_operator_location_type

Set the operator location type for a System message.

int rid_system_set_operator_location_type (
    rid_system_t *system,
    rid_operator_location_type_t type
)

Parameters:

  • system Pointer to the System message structure.
  • type The operator location type to set.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.

function rid_system_set_timestamp

Set the timestamp for a System message.

int rid_system_set_timestamp (
    rid_system_t *system,
    uint32_t timestamp
)

Parameters:

  • system Pointer to the System message structure.
  • timestamp Seconds since RID epoch (2019-01-01 00:00:00 UTC).

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.

function rid_system_set_ua_classification_category

Set the UA classification category for a System message.

int rid_system_set_ua_classification_category (
    rid_system_t *system,
    rid_ua_classification_category_t category
)

Parameters:

  • system Pointer to the System message structure.
  • category The UA classification category to set.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.

function rid_system_set_ua_classification_class

Set the UA classification class for a System message.

int rid_system_set_ua_classification_class (
    rid_system_t *system,
    rid_ua_classification_class_t class
)

Parameters:

  • system Pointer to the System message structure.
  • class The UA classification class to set.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.
  • RID_ERROR_OUT_OF_RANGE if classification_class exceeds RID_UA_CLASSIFICATION_CLASS_MAX.

function rid_system_set_unixtime

Set the timestamp for a System message from Unix timestamp.

int rid_system_set_unixtime (
    rid_system_t *system,
    uint32_t unixtime
)

Converts Unix timestamp to RID epoch and stores.

Parameters:

  • system Pointer to the System message structure.
  • unixtime Unix timestamp (seconds since 1970-01-01 00:00:00 UTC).

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL.

function rid_system_to_json

Format a System message as a JSON string.

int rid_system_to_json (
    const rid_system_t *system,
    char *buffer,
    size_t buffer_size,
    size_t *needed_size
)

Parameters:

  • system Pointer to the System message structure.
  • buffer Buffer to store the JSON string or NULL.
  • buffer_size Size of the buffer.
  • needed_size If non-NULL receives the required buffer size.

Return value:

  • RID_SUCCESS on success.
  • RID_ERROR_NULL_POINTER if system is NULL or if bothbuffer andneeded_size are NULL.
  • RID_ERROR_BUFFER_TOO_SMALL if buffer is too small.

function rid_system_validate

Validate a System message structure.

int rid_system_validate (
    const rid_system_t *system
)

Checks that all fields contain valid encoded values according to ASTM F3411-22a.

Parameters:

  • system Pointer to the System message structure to validate.

Return value:

  • RID_SUCCESS if all fields are valid.
  • RID_ERROR_NULL_POINTER if system is NULL.
  • RID_ERROR_INVALID_PROTOCOL_VERSION if protocol version is invalid.
  • RID_ERROR_UNKNOWN_MESSAGE_TYPE if message type is not SYSTEM.
  • RID_ERROR_INVALID_LATITUDE if operator latitude is out of range.
  • RID_ERROR_INVALID_LONGITUDE if operator longitude is out of range.

function rid_ua_classification_category_to_string

Convert UA classification category to string representation.

const char * rid_ua_classification_category_to_string (
    rid_ua_classification_category_t category
)

Parameters:

  • category The UA classification category to convert.

Returns:

String representation of the UA classification category. Returns "UNKNOWN" for invalid values.

function rid_ua_classification_class_to_string

Convert UA classification class to string representation.

const char * rid_ua_classification_class_to_string (
    rid_ua_classification_class_t class
)

Parameters:

  • class The UA classification class to convert.

Returns:

String representation of the UA classification class. Returns "UNKNOWN" for invalid values.

Macros Documentation

define RID_AREA_CEILING_INVALID

Value indicating invalid area ceiling altitude.

#define RID_AREA_CEILING_INVALID -1000.0f

define RID_AREA_CEILING_INVALID_ENCODED

Encoded value for invalid area ceiling altitude.

#define RID_AREA_CEILING_INVALID_ENCODED 0

define RID_AREA_CEILING_MAX

Maximum area ceiling altitude in meters.

#define RID_AREA_CEILING_MAX 31767.0f

define RID_AREA_CEILING_MIN

Minimum area ceiling altitude in meters.

#define RID_AREA_CEILING_MIN -1000.0f

define RID_AREA_COUNT_MAX

Maximum area count value.

#define RID_AREA_COUNT_MAX UINT16_MAX

define RID_AREA_FLOOR_INVALID

Value indicating invalid area floor altitude.

#define RID_AREA_FLOOR_INVALID -1000.0f

define RID_AREA_FLOOR_INVALID_ENCODED

Encoded value for invalid area floor altitude.

#define RID_AREA_FLOOR_INVALID_ENCODED 0

define RID_AREA_FLOOR_MAX

Maximum area floor altitude in meters.

#define RID_AREA_FLOOR_MAX 31767.0f

define RID_AREA_FLOOR_MIN

Minimum area floor altitude in meters.

#define RID_AREA_FLOOR_MIN -1000.0f

define RID_AREA_RADIUS_MAX

Maximum area radius in meters.

#define RID_AREA_RADIUS_MAX 2550

define RID_OPERATOR_ALTITUDE_INVALID

Value indicating invalid operator altitude.

#define RID_OPERATOR_ALTITUDE_INVALID -1000.0f

define RID_OPERATOR_ALTITUDE_INVALID_ENCODED

Encoded value for invalid operator altitude.

#define RID_OPERATOR_ALTITUDE_INVALID_ENCODED 0

define RID_OPERATOR_LATITUDE_INVALID

Value indicating invalid operator latitude.

#define RID_OPERATOR_LATITUDE_INVALID DBL_MAX

define RID_OPERATOR_LONGITUDE_INVALID

Value indicating invalid operator longitude.

#define RID_OPERATOR_LONGITUDE_INVALID DBL_MAX

define RID_SYSTEM_TIMESTAMP_EPOCH

Timestamp epoch (2019-01-01 00:00:00 UTC as Unix timestamp).

#define RID_SYSTEM_TIMESTAMP_EPOCH 1546300800