[Shake-dev] db2xml

[Peter Lombard]

Kris,

db2xml does allow horizontal channels with direction codes other than E and
N. See this comment found in db2xml:

# For the given net.sta and for each location code,
# try to form groups of channels like HNE, HNN, HNZ, based on the
# first two letters of the channel name.
# Ideally we expect there to be three channels in a group, but
# there might be more or less. If there are more, we declare an error
# and skip the station; could use some ideas on how to do this better.
# ShakeMap assumes channels are either vertical or horizontal; it does
# not care about the azimuth of horizontal channels but assumes that pairs
# of horizontal channels are orthogonal.
# The only way this program and ShakeMap can identify vertical channels
# is by the SEED orientation code (third letter of channel code) being 'Z'.
# Likewise, orientation codes of E and N definitely identify channels as
# being horizontal. Channels with other orientation codes could point in
# any direction.
# Therefore we insist that channel groups consist of three or fewer channels
# ending in E, N or Z; or 1 to 3 channels one of which must end in Z.


Pete


Kris Pankow writes:
 > Just an FYI for those running AQMS with ShakeMap, in scanning through a 
 > log file today I learned that db2xml ( $Id: db2xml 1472 2015-09-14 
 > 22:45:19Z cbworden $        USGS) is hard coded to only accept E N Z for 
 > seismometer orientation.  However, there are networks such as US where 
 > the horizontal channels are designated 1 and 2.  I am running version 
 > 3.5 r 1543.  This is not a huge issue for our network, but as I started 
 > an FYI.
 > 
 > Kris
 > 
 > 
 > -- 
 > Kristine Pankow, Ph.D.
 > Research Professor of Geophysics &
 > Assoc. Director of Seismograph Stations
 > University of Utah
 > 115 South 1460 East
 > Salt Lake City, Utah 84112
 > 
 > pankow <at> seis.utah.edu (email)
 > 801-585-6484 (voice)
 > 801-585-5585 (fax)
 > 
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