[Shake-dev] db2xml
Kris Pankow
pankow at seis.utah.edu
Wed Mar 1 21:51:05 UTC 2017
Hi Pete,
Thank you. We don't, currently, include the processing of the vertical
channels for ground motion. Although, now I guess I should rethink
that. Thanks helping with this.
Kris
On 3/1/17 2:39 PM, Peter Lombard wrote:
> Kris,
>
> db2xml will report those errors if there is no "Z" channel in a group of three
> channels. This is how db2xml figures out which channels are horizontal: that
> they are part of a triplet with a Z channel that it can determine is
> vertical. Otherwise, db2xml has no way to decide whether "BH1" of "BH2" are
> vertical, horizontal, or some other orientation.
>
> Pete
>
>
> Kris Pankow writes:
> > Thanks Pete. I will have to look more closely at the implementation in
> > the code. I am definitely getting errors related to orientation for
> > stations with the 1 and 2 designations. I do not get similar errors for
> > the E and N designations.
> > Kris
> >
> > shake.log.60171887:2016-11-25 08:53:17 : db2xml: error: unable to
> > detemine orientations of US.AHID (BH1 BH2); skipping station
> > shake.log.60171887:2016-11-25 08:53:17 : db2xml: error: unable to
> > detemine orientations of US.DUG (BH1 BH2); skipping station
> > shake.log.60171887:2016-11-25 08:53:17 : db2xml: error: unable to
> > detemine orientations of US.HWUT (BH1 BH2); skipping station
> > shake.log.60171887:2016-11-25 09:14:51 : db2xml: error: unable to
> > detemine orientations of US.AHID (BH1 BH2); skipping station
> > shake.log.60171887:2016-11-25 09:14:51 : db2xml: error: unable to
> > detemine orientations of US.DUG (BH1 BH2); skipping station
> > shake.log.60171887:2016-11-25 09:14:51 : db2xml: error: unable to
> > detemine orientations of US.HWUT (BH1 BH2); skipping station
> > shake.log.60171887:2016-11-28 09:47:33 : db2xml: error: unable to
> > detemine orientations of US.AHID (BH1 BH2); skipping station
> > shake.log.60171887:2016-11-28 09:47:33 : db2xml: error: unable to
> > detemine orientations of US.DUG (BH1 BH2); skipping station
> > shake.log.60171887:2016-11-28 09:47:33 : db2xml: error: unable to
> > detemine orientations of US.HWUT (BH1 BH2); skipping station
> > shake.log.60173377:2016-12-07 08:23:22 : db2xml: error: unable to
> > detemine orientations of IW.IMW (BH2); skipping station
> > shake.log.60173377:2016-12-07 08:23:22 : db2xml: error: unable to
> > detemine orientations of US.AHID (BH1 BH2); skipping station
> > shake.log.60173377:2016-12-07 08:23:22 : db2xml: error: unable to
> > detemine orientations of US.HWUT (BH1 BH2); skipping station
> > shake.log.60173377:2016-12-07 08:23:23 : db2xml: error: unable to
> > detemine orientations of IW.IMW (BH2); skipping station
> > shake.log.60173377:2016-12-07 08:23:23 : db2xml: error: unable to
> > detemine orientations of US.AHID (BH1 BH2); skipping station
> > shake.log.60173377:2016-12-07 08:23:23 : db2xml: error: unable to
> > detemine orientations of US.HWUT (BH1 BH2); skipping station
> > shake.log.60173377:2016-12-07 08:23:23 : db2xml: error: unable to
> > detemine orientations of IW.IMW (BH2); skipping station
> > shake.log.60173377:2016-12-07 08:23:23 : db2xml: error: unable to
> > detemine orientations of US.AHID (BH1 BH2); skipping station
> > shake.log.60173377:2016-12-07 08:23:23 : db2xml: error: unable to
> > detemine orientations of US.HWUT (BH1 BH2); skipping station
> > shake.log.60187322:2017-03-01 01:44:02 : db2xml: error: unable to
> > detemine orientations of US.DUG (BH1); skipping station
> > shake.log.60187322:2017-03-01 01:44:02 : db2xml: error: unable to
> > detemine orientations of US.WUAZ (BH1 BH2); skipping station
> > shake.log.60187322:2017-03-01 01:51:20 : db2xml: error: unable to
> > detemine orientations of US.DUG (BH1); skipping station
> > shake.log.60187322:2017-03-01 01:51:20 : db2xml: error: unable to
> > detemine orientations of US.WUAZ (BH1 BH2); skipping station
> > shake.log.60187322:2017-03-01 08:38:04 : db2xml: error: unable to
> > detemine orientations of US.DUG (BH1); skipping station
> > shake.log.60187322:2017-03-01 08:38:04 : db2xml: error: unable to
> > detemine orientations of US.WUAZ (BH1 BH2); skipping station
> >
> >
> >
> > On 3/1/17 2:17 PM, Peter Lombard wrote:
> > > 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)
> > > >
> > > > _______________________________________________
> > > > Shake-dev mailing list
> > > > Shake-dev at geohazards.usgs.gov
> > > > https://geohazards.usgs.gov/mailman/listinfo/shake-dev
> > >
> > >
> >
> >
> > --
> > 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)
> >
>
>
--
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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