HPD Software Bug fixes

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Version v2.7
Released:		December 22, 2000
Changes made by:	Mark Govett

Operating Systems Affected:	Solaris, HP-UX, IRIX, Linux, DOS, AIX

Summary of Changes:

1.  Fixed bug reported by user illustrating problems with the UTC time zone
	conversion because LQ entries were appearing as a units type due to
	uninitialized flag entries.

    Examples:

	OLD UTC RECORD (v2.6)
	  12162604 LQ 19940413 UTC 00 02 020010  250010

	NEW UTC RECORD (v2.7)
	  12162804 HT 19940413 UTC 00 02 020010  250010



2.  Additional problems were found while fixing this bug including the output
	of spurious records when no data existed (start/end of year).

	OLD UTC RECORD (v2.6)
	 01000800 NO 19940101 UTC 99 02 019999{ 259999I 
	 04321905 HT 19940301 UTC 00 03 019999{ 099999[ 259999I 

	NEW UTC RECORD (v2.7)
	 04321905 HT 19940301 UTC 00 03 010000g 099999[ 259999I


3.  WARNING - in the event the region changes in the station id, duplicate
	day one entries may be present.  At the present time, there
	is no good way to remove these addional entries but they don't appear
	very often.

    Examples:

	LOCAL RECORD:
	 31784502 HT 19940731 LST 05 02 249999} 250000P 
	 31784505 HT 19940801 LST 05 02 019999{ 250000P 

	OLD UTC RECORD (v2.6)
	 31784505 HT 19940801 UTC 00 03 019999{ 069999{ 259999I
	 31784505 HT 19940831 UTC 00 02 249999} 259999I

	NEW UTC RECORD (v2.7)
	 31784502 HT 19940801 UTC 00 03 019999{ 059999} 259999I 
	 31784505 HT 19940801 UTC 00 03 010000g 069999{ 259999I 


	Here the correct entry might ignore differences in the last two
	digits of the station identifer (the region number) and simply
	output a single record.  For example:

	 31784502 HT 19940801 UTC 00 02 019999{ 259999I

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Version 2.8
Released:		August 1, 2001
Changes made by:	Mark Govett

Operating Systems Affected:	Linux

Summary of Changes:

1. The HPD data retrieval program was incorrectly attempting to close files
	that had never been opened.  The Linux version was core dumping when
	this situation was encountered.  All other OS's seem to handle this
	case just fine.


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Version 2.8-1
Released:		August 15, 2001
Changes made by:	Mark Govett

Operating Systems Affected:	All

Summary of Changes:

1.  Corrected a problem that prevented users from accessing data between
1900 through 1945.

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Version v2.9
Released:		January 30, 2001
Changes made by:	Mark Govett
Operating Systems Affected:	All

Summary of Changes:

1.  Corrected a problem appearing in all output format requests in the 
Java display format.  The bug appeared due to corrections made in version
v2.7 which prevented daily entries from being output correctly.