MIL-HDBK-1300A
5.5.1.6 User defined. User-defined compression may include any compression algorithm of the user's choosing. It is the user's responsibility to ensure that the receiving SIDS has access to the same algorithm to decompress the image.
5.6 Communications component. The exchange of NITF files among systems requires transfer protocols and communications media. For well-established networks (DISN), the common transfer protocols and interfaces may be used. For networks that lack common transfer protocols, the TAC02 will be used.
5.6.1 TAC02. TAC02 uses a layered model, similar in philosophy to the IS0 0pen Systems Interconnection Reference Model. The TAC02 model is shown on figure 10. The NRTS layer provides the interface between the user process and the lower layers of the TAC02 protocol stack. The Network Block Transfer (NETBLT) layer is based on a multiple buffer paradigm, which can use most of the available data communication bandwidth efficiently, even on lossy, long-latency links. The other lower layers of TAC02 use protocols that accommodate the needs of tactical circuits.
FIGURE 10. The TAC02 message transfer reference model.
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