Encapsulation (133.0-B-2)

Group: CCSDS > Space Packet Protocol (SPP)

CCSDS 133.0-B-2 Space Packet Protocol (SPP) Encapsulation. Using the octet string assembly function

Parameters

General

Maximum Input Length

• Description: Maximum length of octet input packets
• Automation reference: MaximumPacketLength
• Range: [1; 65536]
• Type: integer

APID

• Description: Value uniquely identifies a stream of packets (indicates source, destination, or type).
• Automation reference: APID
• Range: [0; 2047]
• Type: integer

Packet Type

• Description: Packet type of outgoing packets.
• Automation reference: PacketType
• Type: enumeration

Identifier	Value	Description
Telemetry	Telemetry
Telecommand	Telecommand

Secondary Header

Ancillary Data Source

• Description: Append ancillary data in the secondary header from this source
• Automation reference: AncillaryDataSource
• Type: enumeration

Identifier	Value	Description
None	None
Constant	Constant
Metadata	Metadata	Get ancillary data from PDU metadata using the 'SpacePacket.AncillaryData' key

Ancillary Data

• Description: Ancillary data formatted as hex to include in secondary header
• Automation reference: AncillaryData
• Enablement: AncillaryDataSource == Constant
• Type: string

Ancillary Length

• Description: Length of ancillary data field. Any input data will be truncated or zero padded to fit in exactly this amount of bytes.
• Automation reference: AncillaryDataLength
• Range: [1; 65536]
• Enablement: AncillaryDataSource in [Constant, Metadata]
• Type: integer

Time code

Embed CUC time code

• Description: Include timestamp in secondary header
• Automation reference: EmbedTimestamp
• Type: boolean

P-Field

• Description: Include P-Field in time code
• Automation reference: TimeIncludePField
• Enablement: EmbedTimestamp == True
• Type: boolean

Int bytes

• Description: Number of bytes for seconds since epoch
• Automation reference: TimeSecondBytes
• Enablement: EmbedTimestamp == True
• Type: integer

Fractional bytes

• Description: Number of bytes for fractions of a second since epoch
• Automation reference: TimeFractionalBytes
• Enablement: EmbedTimestamp == True
• Type: integer