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12
satrs-book/src/communication.md
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# Communication with sat-rs based software # Communication with sat-rs based software
Communication is a huge topic for satellites. These systems are usually not (directly) connected Communication is a huge topic for space systems. They are usually not (directly) connected
to the internet and only have 1-2 communication links during nominal operation. However, most to the internet and only have 1-2 communication links during nominal operation. However, most
satellites have internet access during development cycle. There are various standards provided by of these systems have internet access during development cycle. There are various standards
CCSDS and ECSS which can be useful to determine how to communicate with the satellite and the provided by CCSDS and ECSS which can be useful to determine how to communicate with the satellite
primary On-Board Software. and the primary On-Board Software.
# Application layer # Application layer
Current communication with satellite systems is usually packet based. For example, the CCSDS space Most communication with space systems is usually packet based. For example, the CCSDS space
packet standard only specifies a 6 byte header with at least 1 byte payload. The PUS packet packet standard only specifies a 6 byte header with at least 1 byte payload. The PUS packet
standard is a subset of the space packet standard which adds some fields and a 16 bit CRC, but standard is a subset of the space packet standard, which adds some fields and a 16 bit CRC, but
it is still centered around small packets. `sat-rs` provides support for these ECSS and CCSDS it is still centered around small packets. `sat-rs` provides support for these ECSS and CCSDS
standards to also attempts to fill the gap to the internet protocol by providing the following standards to also attempts to fill the gap to the internet protocol by providing the following
components. components.

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satrs-book/src/design.md
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# Framework Design # Framework Design
Satellites and space systems in general are complex systems with a wide range of requirements for Satellites and space systems in general are complex systems with a wide range of requirements for
both the hardware and the software. both the hardware and the software. Consequently, the general design of the framework is centered
Consequently, the general design of the framework is centered around many light-weight components around many light-weight components which try to impose as few restrictions as possible on how to
which try to impose as few restrictions as possible on how to solve certain problems. solve certain problems.
There are still a lot of common patterns and architectures across these systems where guidance There are still a lot of common patterns and architectures across these systems where guidance
of how to solve a problem and a common structure would still be extremely useful to avoid pitfalls of how to solve a problem and a common structure would still be extremely useful to avoid pitfalls

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satrs-book/src/introduction.md
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in addition to the regular API documentation. It contains the following resources: in addition to the regular API documentation. It contains the following resources:
1. Architecture informations and consideration which would exceeds the scope of the regular API. 1. Architecture informations and consideration which would exceeds the scope of the regular API.
2. General information on how to build On-Board Software and how `sat-rs` can help to fulfill
the unique requirements of writing software for remote systems.
2. A Getting-Started workshop where a small On-Board Software is built from scratch using 2. A Getting-Started workshop where a small On-Board Software is built from scratch using
sat-rs components. sat-rs components.