simple
This is a collection of very simple DHI clients that nevertheless do useful things. They are primarily aimed at showing basics of how to code a DHI client including finding a server, connecting to it and retrieving some useful information. Because they are meant to be as simple and independent as possible, much code is repeated. They should be used to get over the basic learning curve of writting DHI clients.
A tar or zip file with scripts and all needed jars can be downloaded here.
The EventClient makes a simple query to the IRIS EventDC to retrieve and print out recent earthquakes. Here is a sample of the output
INFO - got 42 events INFO - 0th origin is at latitude 33.32 longitude 142.32 and its magnitude is 5.2 INFO - 1th origin is at latitude 33.32 longitude 142.32 and its magnitude is 5.6 INFO - 2th origin is at latitude 2.8423 longitude 93.5439 and its magnitude is 5.7 INFO - 3th origin is at latitude 2.84 longitude 93.54 and its magnitude is 5.7
The NetworkClient makes a simple query to the IRIS NetworkDC to retrieve and print out stations and channels. Here is a sample of the output
INFO - Network II has 44 stations INFO - PFO, Pinon Flat, California, USA is located at 33.6092, -116.4553 INFO - Station II.PFO has 473 channels.
The ResponseClient makes a query to the IRIS NetworkDC to retrieve and print out the response for a channel. Here is a sample of the output
INFO - Got 44 stations INFO - Got 473 channels from PFO INFO - Channel: II.19861024T00:00:00.000Z.PFO. .BHE.19950119T00:00:00.000Z INFO - # ################################################################################### # B050F03 Station: PFO B050F16 Network: II B052F03 Location: B052F04 Channel: BHE B052F22 Start date: 1995,019,00:00:00 B052F23 End date: 1997,261,23:59:59 # # +-----------------------------------+ # | Response (Poles and Zeros) | # | II PFO BHE | # | 01/19/1995 to 09/18/1997 | # +-----------------------------------+ #
The SacPoleZeroClient is similar to the ResponseClient, but prints out the response as a Sac polezero file. Here is a sample of the output
INFO - Got 44 stations INFO - Got 473 channels from PFO INFO - Channel: II.19861024T00:00:00.000Z.PFO. .BHE.19950119T00:00:00.000Z INFO - PoleZero: ZEROS 6 -78.5398 0.0000 -0.1525 0.0000 -0.1525 0.0000 POLES 12 -0.0125 0.0122 -0.0125 -0.0122 -0.1284 0.0000 -0.1811 0.0000 -40.0569 48.4075 -40.0569 -48.4075 -303.4778 81.2234 -303.4778 -81.2234 -222.1445 222.1439 -222.1445 -222.1439 -81.3044 303.4559 -81.3044 -303.4559 CONSTANT 2.4538751E25
The SeismogramClient makes a simple query to the IRIS DataCenter to retrieve and print out a seismogram. Here is a sample of the output
INFO - querying for IU.HRV. .BHE INFO - seis[0] has 31450 points and starts at 2003-06-20T06:20:19.752Z