West Coast/Alaska Tsunami Warning
Center
Operations Manual
NOAA/NWS/WCATWC
Palmer,
http://wcatwc.arh.noaa.gov
Section
4.1.2 – develo
Last
Updated: 5/2007
Date
Written: 4/2001
Development Language: MicroSoft
C/C++ v7.0 using WinAPI
Necessary Rings:
Input Ring - WAVE_RING;
reads TYPE_TRACEBUF format messages
Output
Ring - PICK_RING; writes (and reads) TYPE_PICKTWC format messages
Output Ring - ALARM_RING;
writes TYPE_ALARM format messages
Necessary Data Files:
StaFile - picker
configuration file
StaDataFile - seismometer
location, elevation, etc.
ScreenFile - Sub-screen control file
DummyFile - Hypo-parameters of last
located quake
Initialization File:
develo.d - read
on module start-up
Module Description:
This program takes waveforms from the Input Ring and displays them on a
Windows window. The display is similar to an old-style develocorder (with no
film delay). Every X seconds the screen scrolls to the left. The most recent
data is shown on the right side of the screen. The display can be
"held" and manually scrolled through previous times (the time limit
of saved data is specified in the .d file).
P-picks entered to a PICK_RING are obtained by this module. The picks are
displayed on the scrolling traces. P-picks can also be entered to a pick ring
interactively through this module. P-picks are made by left-clicking on a
trace. Magnitude information (Mb, Ml, Mwp) are also computed as the pick is
made. The incoming signal to display is specified in the StaFile used by
pick_wcatwc. ScreenFile can be used by this module. This INI file specifies
subsets of stations which are shown on the screen.
This module provides filters which operate on broadband data when specified in
StaFile. Data is short period filtered for display and for magnitude
computations (Mb, Ml). Mwp integrations utilize the unfiltered, broadband data
only.
As data is displayed, it can also be processed by an alarm function (similar to
that in pick_wcatwc). If the signal exceeds some pre-determined thresholds, an
alarm is declared and the ALARM_RING notified. The advantage of using the alarm
function here instead of in pick_wcatwc is that alarms can be interactively
turned on/off on individual stations through the GUI.
Program Controls:
This module has a Windows graphical interface.
Due to this interface, the module will only compile and run under Windows (NT,
2K, or XP). The display shows real-time, short period or broadband data. The
most recent time is shown on the right side of the screen. As new data arrives,
the screen scrolls left. A "Hold Screen" menu option is available to
stop the automatic scrolling. Then, the horizontal scroll bars can be used to
manually scroll through all the data which is in memory. P-picks are displayed in red as they are read
from the PICK_RING. Also, green indicators are displayed showing where the P
will be expected at each of the sites for the last computed location.
Mouse buttons:
Right button on trace toggles trace display.
Right button on station name calls station manipulation menu (for trace scaling, station description, trace display on/off, alarm
on/off).
Left button on trace sets P-time and Mb, Ml, and Mwp
magnitude information are determined when station sensitivity is known.
Left button on station name eliminates the station from
further processing in loc_wcatwc.
Menu Options:
Hold
Screen: Prevent automatic scrolling so that scroll bars can be used to move
through data.
Horizontal Scale: Change screen time scale.
Vertical Trace Scale - All: Change vertical scale for all stations.
Traces Per Screen: Number of traces vertically to show on the screen, rest will scroll.
Show Channel: Display channel name to right of Station Name.
Show Network:
Display Network ID to right of Station Name.
Pick Stations: |
All Stations: |
West Coast Stations:| The checked option is
the subset
Hawaiian Stations: | of stations shown on the screen.
Atlantic Stations: |
Worldwide Stations: |
Low Gain Stations: |
Display Filtered Data: Check -> screen shows SP/LP filtered signal for
broadband stations.
Display Broadband Data: Check -> screen shows unfiltered traces for all
stations.
Magnitude:
Mwp: Set Max Window Time: Set the maximum integration
time and S:N manually for broadband stations (used with original Mwp method).
Display
Integrations: Show the integrated waveforms for all stations which could
compute an Mwp
ClipIt:
Limit trace amplitudes.
Refresh: Re-paint the screen.