For MDP 3.0 messaging, a standard technical header is included in all packets sent on Real-Time Feed, Snapshot, and Instrument Recovery Feeds.
| Name | Binary Type (Size) | Number of Bytes | Req | Description |
|---|---|---|---|---|
| MsgSeqNum | uInt32 | 4 | Y | Packet sequence number. A unique sequence number given to each packet sent. Each channel will have its own separate set of sequence numbers that will increment sequentially with each packet and reset weekly. |
| SendingTime | uInt64 | 8 | Y | UTC Time of message transmission by the Gateway. UTC Timestamps are sent in number of nanoseconds since Unix epoch synced to a master clock to microsecond accuracy. |