Description

Sets new KLV metadata values.

typedef struct {
  u8 type;
  SVPLenString_t value;
  u16 displayId;
} SLAMetadataStaticValues_t;

Latest values are output with MPEG2-TS enacapsulated video stream, at the rate for each element specified by SLASetMetadataRate_t. For non - string values, data encoding is big-endian as defined by MISB 0603. For example, to encode Target Error Estimate CE90 which is specified as a uint16 value, 'Identifier string length' should be set to 2, byte 6 to the most significant byte of the value, and byte 7 to the least significant byte of value.

This message is also sent in response to SLAGetParameters_t().

Special Notes

Sensor Field of View (Type 18)

Replaces SLASetMetadataValues_t Sensor horizontal field of view (valid data bit = 7) and Sensor vertical field of view (valid data bit = 8).
Set the validDataMask for bits 7 & 8 to 0 in SLASetMetadataValues_t

Example: 51 AC 0A 14 12 04 9C CD 17 D9 00 02 0D

Sensor true altitude HAE (Type 19)

Set the validDataMask for bit 52 in SLASetMetadataRate_t.

Sensor frame center elevation HAE (Type 20)

Set the validDataMask for bit 53 in SLASetMetadataRate_t.

Target Info (Type 21)

Replaces SLASetMetadataFrameValues_t (targetTrackGateHeight, targetTrackGateWidth, etc.) which allowed user to maually specify target location in pixels
Using this command will cause the Slant Range (MISB TAG 21) and Target Width (TAG 22) to be autocalculated.
USE:

sub type = 21 <15>
value = {
  sub len =  9
  u16 Frame Center Elevation
  u16 target Width - in pixels which is then convert to meters.  must be > 0 or no target will calculated
  u16 Origin Row - offset is to center of the target relative to the display coordinates
  u16 Origin Col - offset is to center of the target relative to the display coordinates
  u8 mode - see below 
 } 

Target Info Mode

bit	description
0	enable / disable frame center lat/long = target position lat/long
2	Enable Auto/Manual modes that would normally defined in 0x15 userSuppliedFlags in SLASetMetadataFrameValues_t

EXAMPLE: 51 AC 0F 14 15 09 f3 34 37 00 f0 00 40 10 01 00 02 A3

Security Metadata (TAG 48)

In addition to the security tags below, Version (TAG 48/22) is set internally to value of 0x000A and sent at the default rate.

See also: MISB ST 0102.10 Table 2 for data sizes and values.

Message ID 0x14

Byte Offset

Name

Description

4

type

Static element identifier

Value	Identifier type	MISB TAG
0	Mission Identifier	3
1	Platform Designation	10
2	Image Source Sensor	11
3	Image Coordinate System	12
4	Security: Classification (1 byte)	48 - 1
5	Security: Classifying country coding method (1 byte)	48 - 2
6	Security: Classifying country	48 - 3
7	Security: SCI / SHI information	48 - 4
8	Security: Caveats	48 - 5
9	Security: Releasing Instructions	48 - 6
10	Security: Object Country Coding Method (1 byte)	48 - 2
11	Security: Object Country Code	48 - 13
12	Motion Imagery Core Identifier	94
13	Platform Tail Number	4
14	Target Error Estimate CE90	45
15	Target Error Estimate LE90	46
16	Generic Flag Data 01	47
17	Platform Call Sign	59
18	Sensor Field of View	16
19	Sensor true altitude HAE
20	Frame center elevation HAE	25
21	Target Info	NA
22 - 255	Reserved	NA

5

value.len

string length

6-...

value.str

Identifier string - maximum string length is 127 characters

varies

displayId

Network Display ID
3000 / 4000: (0x0002 = Net0, 0x0080 = Net1, 0x0082 = both)
1500: Ignored or 0x0000