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no station or response data available for OTAZ #34

Closed filefolder closed 2 years ago

filefolder commented 7 years ago

hi there--

can't seem to FDSN any metadata for OTAZ, which seems to be an old auckland area station is no longer up. waveforms are available and a lot of events in the mid 00's reference OTAZ but can't find any further info. not a huge problem but hopefully it just got misplaced somewhere?

thanks!

calum-chamberlain commented 5 years ago

I wanted to point out that this seems to be an issue for other sites and is becoming a bit of a pain. For example sites CNZ and MGZ appear to have been active until 2005, but do not appear on the station search online, nor do they return response or channel information from an FDSN query. e.g.:

from obspy.clients.fdsn import Client

client = Client("GEONET")
client.get_stations(station="MGZ")
"""
Inventory created at 2018-12-18T02:39:42.000000Z
    Created by: Delta

    Sending institution: GeoNet (WEL(GNS_Test))
    Contains:
        Networks (1):
            NZ
        Stations (1):
            NZ.MGZ (Maungaku)
        Channels (0):

"""
client.get_stations(station="MGZ", level="response")
"""
FDSNNoDataException: No data available for request.
Detailed response of server:

"""

The same happens for level=channel.

It looks like the meta-data available through the FDSN doesn't match the waveforms that are available prior to about 2008/2009 very well.

Other examples include:

By the way, the reason I'm running into these issues is because I have downloaded the geonet catalog since 1987, then downloaded waveform data for every pick that was available and I'm now trying to remove the responses for them so that waveform data can be compared from the same site across different epochs.

ozym commented 5 years ago

@calum-chamberlain with a few exceptions, you are bumping into the analogue telemetered sites where the meta data still needs some work. These are mostly in the volcanic regions (and Wellington) and are usually identified by 50 Hz and mostly vertical (SHZ). They could also be recorded at multiple places (due to the telemetry used) so there may be different versions of the same data (10, 11, ...).

The original metadata was based on triggers used in the processing (start / stop times), however we have now attempted to load in all data recorded which may include triggers not used or times when the sites were recording data but outside the estimated range.

Note, due to the nature of the telemetry in most cases we actually won't know what the full responses are. It may be possible to invert back for gain .... but that's another project.

This has been quite a process, we're slowly working back in time. You can see our full metadata archives in https://github.com/GeoNet/delta the stationxml that is returned from FDSN is built from this repo.

calum-chamberlain commented 5 years ago

Oh man that sounds painful to try and do.

It looks like the national network sites have meta-data as far back as they can at the moment, does that sound right?

Thanks again for the response @ozym!

ozym commented 5 years ago

Yes, the National network sites have been easier as they had been single boxes and single sensors prior to the broadband upgrades. There have been exceptions however, the sensors deployed and recorders used at WEL have been very complicated over the years (even including telemetry) ....

calum-chamberlain commented 5 years ago

Thanks for that Mark, that is really useful to know. I will use what I have which still seems to be a large chunk of the data. Thanks!

salichon commented 5 years ago

@ozym I assigned Muriel and myself as a reminder of this for the data team :). Cheers jerome

salichon commented 4 years ago

OTAZ is a station closed in 2009 and has

so far fdsn returns this https://service.geonet.org.nz/fdsnws/station/1/query?station=OTAZ&level=station

-Other metadata Legacy to be addressed or documented back in the past (SH) streams like UTU, TAZ (see comments of Mark above about the the telemetry)

FYI @JonoHanson and Calum

calum-chamberlain commented 4 years ago

Thanks!

salichon commented 2 years ago

Will need investigation to complete metadta in the past