SeismiQuery - DMC Sync File Query Form : IRIS

DMC Sync File Query Form
(for GOAT, Sync files, and Combine)

network

station

location

channel

data start time*
(YYYY MM DD or JJJ HHMMSS)
or

data end time*
(YYYY MM DD or JJJ HHMMSS)
or

channel parameters

sample rate
>=
<=

channel
flags
like

latitude
>=
<=

longitude
>=
<=

elevation
>=
<=

depth
>=
<=

azimuth
>=
<=

dip
>=
<=

sensor type like

site like

by day

Quality

*The start and end time fields are required. Only channels with data in this time span will be selected. [see more help below]

How this query works

You must include:

A start and stop time. If you do not change the default time, that time will be used for your query. Your start time must be earlier than your end time (but no error message will appear if you goof).
At least one network, station, location or channel code.

You can include:

Channel flag parameter: T for triggered or C for continuous. Please be aware that not all data providers use this channel flag.

Once you have started the query you will have 3 output options:

View or Email a Sync file - a "synchronization" file used by DCCs and other network operators to check on the data holdings that they have sent in to the DMC (description of sync file format)
Start GOAT - Gap/Overlap Analysis tool. See exactly what data is available (or missing) from the DMC or you own holdings, channel by channel.
Start Combine - you must name your Sync file and then start Combine to compare files.

There are several GOAT output options:

Graph View displays a Sync file gap/overlap analysis in graphical form. Overlaps are displayed in blue, continuous are green, and gaps are red. Generation of the graph takes some time.
Table View displays a Sync file gap/overlap analysis in tabular form. Overlaps are displayed in blue text, continuous are green, and gaps are red. The table is paged and in general comes up quickly, providing the speediest view of the gap/overlaps. Select the data you want displayed by checking the Overlaps, Continuous, or Gaps boxes in the bottom frame of the window.
View Raw Data button displays the data without joining continuous time spans, but does reformat the date to be similar to the date in the Table display. This is intended to allow the user to compare the raw data with the analysis done in the Table.
Channels may be selected individually, or by the "Select Next 50" button. If more than 50 channels are selected it becomes difficult or impossible to read the channel names on the graph. The "Select Next 50" button selects the next 50 channels after the last selected channel, and serves as a paging mechanism for the graph.
Time Tolerance defines the tolerance at which to consider a time difference to be a gap/overlap or continuous. For instance, if a time tolerance of 1 second is specified, then any time tears or overlaps of 1 second or less will be ignored and that data will be considered continuous. Checking the 1/2*sample rate check box will add that value as an additional tolerance which should account for error due to the sampling period.

Need help? Write to .