26.08.2019
 Ax. 25 Protocol Essay

Issue: 1 Rev: 1 Time: 19/03/2007 Site: 1 of 11

Phase B/C

Telemetry and Telecommand Transfer Support frames Format

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Prepared by: Florian George

Checked simply by: Per Hemso (ESA/ESTEC) Ted Choueiri (EPFL)

Approved by:

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ESA/ESTEC Noordwijk Netherland

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19/03/07

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1 RECORD OF ALTERATIONS

ISS/REV 1/0 1/1 Time 15/03/2007 19/03/2007 Modifications First release Revise after commentaries by Every Hemso Created/modified by Florian George Florian George

Ref.: S3-BC-SE-1-1b-AX. 25 Transfer Casings Format. docx

Issue: 1 Rev: you Date: 19/03/2007 Page: a few of 11

2 DESK OF CONTENTS

1 two 3 RECORD OF CHANGES......................................................................................................................... 2 DESK OF MATERIAL............................................................................................................................. 3 REFERENCES............................................................................................................................................. 4 three or more. 1 3. 2 some 5 six APPLICABLE PAPERWORK REFERENCES PAPERS 4 some

LIST OF SHORTENED FORMS................................................................................................................................ 5 LAUNCH........................................................................................................................................ 6 TRANSFER FRAMES FORMAT.............................................................................................................. 7 6. 1 AX. 25 COPY FRAME FORMATTING 6. 1 ) 1 Flag (8 bits) 6. 1 ) 2 AX. 25 Copy Frame Header (128 bits) 6. 1 . 3 Details Field (0 to 2048 bits) 6th. 1 . some Frame-Check Pattern (16 bits) 6. 2 TELEMETRY INFO FIELD UTILIZATION 6. installment payments on your 1 Telemetry Transfer Framework Secondary Header 6. installment payments on your 2 Data 6. installment payments on your 3 Telemetry Transfer Shape Trailer six. 3 TELECOMMAND INFORMATION FIELD USAGE several 7 several 8 almost 8 9 9 10 11 ERROR! TAKE A NOTE OF NOT IDENTIFIED.

Ref.: S3-BC-SE-1-1b-AX. 25 Transfer Frames File format. docx

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three or more REFERENCES

three or more. 1 Suitable Documents

[A1] AX. twenty-five Protocol Requirements http://www.tapr.org/pdf/AX25.2.2.pdf

a few. 2 Referrals Documents

[R1] [R2] [R3] [R4] [R5] ESA-PSS-04-106 ESA-PSS-04-107 CubeSat software Cyclic Redundancy Check Box Telemetry Common Packet Telecommand Standard http://cubesat.calpoly.edu/ http://en.wikipedia.org/wiki/Cyclic_redundancy_check

MEMO AX. 25 Communication Function, Ted Choueiri, 14/03/2007

Ref.: S3-BC-SE-1-1b-AX. 25 Transfer Frames Format. docx

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4 SET OF ACRONYMS

CCSDS CRC EGSE EPFL AQUELLA ESOC ESTEC FCS GS ICD LMTS MSB SSID TBD TC TM UI-Frame VC Consultative Committee pertaining to Space Data Systems Cyclic Redundancy Check [R5] Electrical Ground-Support Products Ecole Polytechnique FГ©dГ©ral para Lausanne (Swiss Federal Commence of Technology in Lausanne) European Space Agency European Space Procedures Centre European Space Exploration and Technology Centre Frame-Check Sequence Floor Station Program Control Doc Microsystems for space solutions laboratory Most Significant Bit Second Station Identifier To Be Described Telecommand Telemetry Unnumbered Data Frame (see [A1]) Electronic Channel

Ref.: S3-BC-SE-1-1b-AX. twenty-five Transfer Frames Format. docx

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5 INTRODUCTION

This document describes the format from the Transfer Structures used for the mission. While the job will make utilization of the radio beginner network employing radio newbie frequencies, the Transfer Casings must be compliant with the formatting defined in the AX. twenty-five protocol [A1] which is used upon theses instruments. After conversations and responses from other CubeSat [R3] spacecraft development teams, it has been decided that only the Unnumbered Data Frames (UI-Frames) of the process will be used [R4]. To provide the necessary...