(7a) MSG Directive - the user may transmit a text message to the 

 DCS operator (to be displayed on the console) by entering 

 STX MSG ETX after the CDF informs him/her of the number of 

 messages received since the previous inquiry (or by entering 

 MSG following the user ID in the sign-on, separated by a 

 comma). The CDF responds with STX ENTER MESSAGE ETX, after 

 which the user may enter the message. 



(7b) DIS Directive - the user may request transmission of the 



sensor platform data by entering STX DIS ETX after the CDF 

 informs him/her of the number of messages received since the 

 previous inquiry (or by entering DIS following the user ID 

 in the sign-on, separated by a comma). 



Transmission of sensor platform data, if requested, begins 

 with the oldest undisseminated message and continues to the 

 newest message on the user's queue. 



Abnormal platform response messages are transmitted in lieu 

 of data when appropriate, and are identified by two carets 

 (AA) preceding the text of the message. 



Alternatively, the user may specify a new time (other than 



"time of last inquiry") from which dissemination of data 



in the queue may begin, by entering STX DIS DDDHHMMSS ETX in 

 GMT (or UTC). 



(7c) RLT Directive - the user may request transmission of sensor 



platform data acquired after a specified time for information 

 only, by entering STX RLT, DDDHHMMSS ETX after the CDF informs 

 him/her of the number of messages received since the previous 

 inquiry. As in (7b) above, a new time interval may be 

 specified to begin playback. Data disseminated by this method 

 are not recorded by the CDF. 



(8) Once transmission of the most recent sensor platform data (DIS 

 only) has been completed, the CDF sends the following message: 



NNN MESSAGES DISSEMINATED. 



VERIFY: OK, NO, OR STOP. 



If the user enters OK, after DIS (dissemination) the UTC of 

 the last message disseminated will be inserted into the user 

 Queue Table as the "last time of dissemination" (for use the 

 next time he/she calls.) The "number of messages" will be reset 

 to zero, and the message pointers updated. If the user enters 

 NO, then the user Queue Table will not be updated. After 

 either OK or NO, the CDF solicits a new request with the 

 following message: 



ENTER MSG, RLT, DIS, OR STOP. 



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