West Coast/Alaska
Tsunami Warning Center
Operations Manual
NOAA/NWS/WCATWC
Palmer,
http://wcatwc.arh.noaa.gov
Section
4.1.2 – develo
Last
Updated: 9/2010
Date
Written: 4/2001
Development Language: MicroSoft C/C++ v7.0 using WinAPI
Necessary Rings:
Input Ring - WAVE_RING; reads TYPE_TRACEBUF format messages
Input/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
ResponseFile - Broadband instrument response in poles/zeroes format
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). Traces can be scaled and sorted by menu
options or accelerator keys.
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 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.
Show Epicentral Distance: Display Epicentral distance from
last quake 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: |
Display Filtered Data: Check -> screen shows SP/LP
filtered signal for broadband stations.
Display Broadband Data: Check -> screen shows unfiltered
traces for all stations.
Show Velocity Data: Trace is seismometer output.
Show Acceleration Data: Trace is differential of raw data.
Show Displacement Data: Trace is integral of raw data.
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
Sort:
Alphabetical: Order stations on screen in
alphabetical order
Network: Order stations on screen by Network
Distance: Order stations on screen by distance
from last quake
Geographical: Order stations on screen by
original, geographic order (default)
Find: Enter station code to center on screen
ClipIt:
Limit trace amplitudes.
Refresh: Re-paint the screen.
Accelerator
Keys:
Arrow Up: Show more traces on screen.
Arrow Down: Show less traces on screen.
Arrow Right: Increase horizontal scale.
Arrow Left: Decrease horizontal scale.
Page Up: Increase vertical scale.
Page Down: Decrease vertical scale.
A: Show acceleration signal.
B: Show broadband data.
D: Show displacement data.
F: Find station.
N: Display Network code.
R: Reset all options to default.
S: Display filtered data.
V: Display velocity data.
F5: Sort alphabetically
F6: Sort by Network
F7: Sort by Distance
F8: Sort by Original Order (geographic)