CASES97: Logbook Entries

CASES97: GOES Messages: 2 Entries..

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Entry Date Title Site Author #Graphics
17 Tue 08-Apr-1997monitoring GOES quality of transmissionMilitzer, John
16 Tue 08-Apr-1997looking at statusOncley, Steve


17: GOES, Site , Tue 08-Apr-1997 17:21:08 GMT, monitoring GOES quality of transmission
			NESDIS RF QUALITY Parameters
			        DOMSAT Values
			----------------------------

	The pam_ascii data files include RF quality parameters with
	each message.

	To make it easier to examine use:

	cut -c10-60 /pam/pam_ascii/970408.pam > rf.text.file

	That removes the bulk of the data, and the superflous year/day
	from the header.
	You'll then have something like this (without the title)
  time	   sta      source   RF-Qualities      data.....
-------- --------   ------ ------------------  --------
00:01:27 364184A0   DOMSAT:G47-2NN117EFF00239  e@@B
00:03:27 3641C7AA   DOMSAT:G46-2NN117EFF00240  n@@B
00:06:27 364184A0   DOMSAT:G47-2NN117EFF00239  e@@B
00:08:27 3641C7AA   DOMSAT:G46-2NN117EFF00240  n@@B
00:11:27 364184A0   DOMSAT:G47-2NN117EFF00239  e@@B

	You can fgrep that file for the specific platform(s)
	of interest.

	The RF quality stuff for DOMSAT is actually what's monitored
	by the main NESDIS receive site at Wallops.  It includes:

'G'	Good message
	Alternatives =
	?	message with parity error
	W	message received on wrong channel
	D	previous msg was duplicated (ie rcvd on multiple
		channels)
	Q	bad signal quality measurements
	A	correctable address error
	B	bad address
	I	invalid address
	T	outside it's assigned time (N/A for NCAR)
	U	unexpected (N/A for NCAR)
	M	missing (N/A for NCAR)
	N	incomplete platform description table at NESDIS

'46'	Signal Strength in dbm EIRP  (this is a good value, expect
	between 44-49.  more than that is naughty but ok, much less
	and you won't get it.  resolution is 1dbm

'-2'	Frequency Offset * 50Hz: ie -2 = -100Hz from assigned center
	frequency.  Range = +/- 0-A (beyond 500 Hz and you probably
	won't get it.  expect between +/- 0-5.

'N'	Normal modulation index (or Low, High)

'N'	Normal data quality bit-error-rate <= 1x10**(-6)
	or Fair 10**(-4) to 10**(-6)
	or Poor < 10**(-4)

'117E'	Channel 117 GOES-east

'FF'	Uplink carrier status of DOMSAT, ignore this.

'00239'	Decimal Length of data in bytes








16: GOES, Site , Tue 08-Apr-1997 13:36:33 GMT, looking at status
(From John M.) 

On stout:

/rdss/pam/bin/ingest_status -p CASES

        all it does is count messages received, but that's a start.
        also, i believe there seems to be a slight counting problem
        that occurs occassionally showing 13 messages during an
        hour....haven't looked into that yet.