Title: ADS - Time Stamp Addition

PDR Reference:				97060003
Originator Reference: 			ADS_TIME
SARPs Document Reference: 		ADS SARPs, Section 2.2.1.4.2
Status: 				      WITHDRAWN
PDR Revision Date:			18/08/97 (SME rec. ACCEPTED -> WITHDRAWN)
PDR Submission Date:			27/06/97
Submitting State/Organization: 	Aerospatiale
Submitting Author Name: 		Populus, F.
Submitting Author E-mail Address:	frederique.populus@avions.aerospatiale.fr
Submitting Author Supplemental 
Contact Information: 			Mrs Frédérique POPULUS,									      A/BTE/SY/GGV B0403, 									      AEROSPATIALE, 
				       	316 route de Bayonne, 				
					      31060 Toulouse, France
				      	tel : 33 (0)5 61 18 44 18
				      	fax : 33 (0)5 61 93 80 06
SARPs Date: 				IV1.1, March 1997
SARPs Language:				English

Summary of Defect: 

The ICAO Manual states in Part III Chapter 2 Section 2.4.2 that time stamping will be available for all ADS messages and that the time stamp will consist of the date (YYMMDD) and time (HHMMSS).
No time stamp has been defined for uplink ADS messages in this section whereas section 2.4.2 of ADS-P Manual part III says: 'time stamping will be available for all messages.

Assigned SME:				Sub-Volume II SME

Proposed SARPs amendment: 

SME Recommendation to CCB:		WITHDRAWN	

ADSP recognised (Brisbane meeting) that the requirement in the manual is ambiguous. There is no requirement mandating to have the timestamp sent along the line with the ADS messages. Timestamps generated and stored locally in the a/c and in the ground may be sufficient.
Therefore there is no inconsistency between the ICAO Manual and the SARPs. The author withdraws the PDR.

CCB Decision:				CCB-2 (Langen): SUBMITTED
						atnp_ccb_chair: ACCEPTED (22/09/97)