I.B. + M.A. DE LANDE LONG
SOFTWARE + CONSULTANCY

Background experience in spacecraft protocols

We have long, in-depth experience of the development, testing and review processes for the international standards and recommendations for spacecraft protocols for CCSDS, ESA and ECSS.

ECSS Standards for Telemetry and Telecommand Space Data Links, 2002-2007

From 2002 we provided support for the development of telemetry and telecommand standards for ECSS (European Cooperation for Space Standardization). ECSS published the new standards in November 2007: ECSS-E-50-01A, -03A and -04A.

COP-1 review in 2001

In 2001, we performed a validation study for ESA of changes to COP-1, the Transfer Layer protocol of Packet Telecommand. The revised version is called COP-1B. The validation included

tests to check the behaviour of the complete COP-1B State Tables
tests to check the changes

The study demonstrated the need for an additional amendment and provided useful background information for input to the CCSDS panel. COP-1B was formally accepted by CCSDS in May 2001. Our own range of telecommand software products includes support for COP-1B.

CFDP review in 2000

We performed a study for ESA in 2000 to review the new CCSDS File Delivery Protocol (CFDP). As part of the study we simulated the operation of CFDP over Packet Telecommand and Telemetry links.

CCSDS and ESA Packet Telecommand standards from 1986 to the present

The recommendations for Packet Telecommand produced by the Consultative Committee for Space Data Systems (CCSDS) have been adopted by NASA, ESA and other space agencies. We were involved in the definition process for the recommendations from 1986, beginning with a study for ESA of the COP-1 Transfer Layer Protocol. The study included

production of a rigorous and unambiguous Formal Description of the protocol
development of a detailed simulator to check the operation of the protocol

The Formal Description resulting from the study formed part of the CCSDS and ESA standards documents. We have subsequently performed many other related studies for ESA. We continue to contribute to the updates and reviews of CCSDS recommendations for space telemetry and telecommand data links and protocols.

TC Standards TM Standards AOS Standards Papers