ix 
9.1.5 External Interfaces ......................................................................... 9-2 
9.2  SENSOR UNIT (NNN-20/30) ............................................................... 9-3 
9.2.1 Electrical Specifications .................................................................. 9-3 
9.2.2 Environment ................................................................................... 9-3 
9.2.3 Dimensions and Mass .................................................................... 9-3 
 
APPENDIX................................................................... APPENDIX 1-1 
Appendix 1    List of Geodetic Systems .......................................... Appendix 1-1 
Appendix 2  Data Output Formats ................................................ Appendix 2-1 
Appendix 3  Terminology .............................................................. Appendix 3-1