ISO INTERNATIONAL 24246 STANDARD Firstedition 2022-06-28 Space systems Requirements for global navigation satellite system (GNSS) positioning augmentation centers Reference number ISO 24246:2022(E) ISO @ IS0 2022 @ IS0 2022, Published in Switzerland or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or Iso's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org i IS02022-Allrightsreserved Contents Page Foreword ..V Introduction. ..vi 1 Scope. ..1 2 Normative references 3 Terms and definitions. 3.1 ..2 Space-based positioning and navigation 3.2 Positioning quality... 3.3 Terrestrial reference system 4 3.4 Positioning results 3.5 Cyber security ..8 4 Abbreviated terms. 5 System overview .9 Universe of discourse .9 6 6.1 General 6.2 Scope of users. ..10 6.3 Servicetype. .10 6.4 ..10 Service area 6.5 Servicetime .10 6.6 Sponsoring organization ..10 7 Requirements for augmentation services ..11 7.1 General .11 7.2 ..11 Standard augmentation service 7.3 Precise augmentation service. .12 7.4 Geodetic service. .13 7.5 Performance factors. .13 7.5.1 General. ..13 7.5.2 Communicable correction factors ..13 7.5.3 Receiver-dedicated correction factors .14 7.5.4 Other correction factors .14 7.6 Integrity information. .14 Requirements for verification .15 8 8.1 .15 General. 8.2 Distinction of accuracy and precision ..15 8.3 Verification ..16 8.3.1 Principle .16 ..16 8.3.2 Horizontal 8.3.3 Vertical .16 8.4 Calibration.. .16 8.5 Evaluation period ..16 8.6 Convergence time ..17 8.7 Quality control items .17 9 Requirements for maintenance .17 9.1 General. ..17 9.2 Continuous performance monitor ..17 9.3 Cyber security .17 9.4 ..17 User service Annex A (informative) Cross-border data exchange ..18 ..19 Annex B (informative) GNsS constellations and systems Annex C (informative) Transmission of augmentation data .20 iii IS02022-Allrightsreserved