computer system over a network. The operator may
choose to reroute selected files and products to remote
sites on a predetermined schedule. The FTP function
can be used to send critical tiles to a remote site. Only
one file may be sent at a time.
ARCHIVING.Aircraft accidents, storm tracks,
and high interest areas provide good reasons to save
environmental data. The archive function allows you to
save individual products and files to floppy disk. As
data is received, it is automatically copied to the
destination path and drive.
FUSION GENERATOR.This function allows
you to overlay various METOC products, such as a
satellite image with a radar image. The operation can be
set up automatically for predefined products at
specified time intervals. There are several map
projection and color scheme options available. In
addition, alphanumeric data ingested from the AWN
can also be fused with other geo-referenced products.
This allows you to overlay any type of data, such as sea
level pressure contours with temperature contours,
surface winds with precipitation, and so forth.
The MIDDS has several receiver modules that
define which products to receive from satellite data,
radar data, AWN data, and digital facsimile data.
SATELLITE (DSP) RECEIVER.This module
allows for the reception of satellite images from GOES-
Tap, HF receiver, APT, or WEFAX. The images are
stored in PCX format and can be captured in several
sizes. Images can be viewed as they are being received,
and a looper display capability is provided. A database
of several different satellites is loaded during
installation. (Digital GOES 8 and 9 imagery will be
received over the Internet or via the Dial RX receiver.)
DIFAX RECEIVER.This module allows you to
receive digital facsimile products from the National
Weather Service. Your system administrator will
establish a DIFAX product database during installation.
DIAL RX RECEIVER.This module acquires
radar images from WSR-88D radar sites by using a
commercial dial-up service or the Internet. It can also
be used to receive GOES satellite images, alphanumeric
products, and DIFAX products.
The DIAL RX accesses a master database that
contains all meteorological stations, including those
stations with WSR-88D radars. (The database also
contains all satellite and DIFAX product types.) From
this database, specific stations can be selected
(activated), and desired products can then be selected
from that particular station. Keep in mind that only
those radars sites near your station need be activated.
After you select the WSR-88D station, you then select
from a list of products that you desire. Your system
administrator can establish a predefined product list for
each WSR-88D station. At some activities, the MIDDS
computer is directly connected to a WSR-88D Principal
User Processor (PUP) circuit by using a CODEX
AWN RECEIVER.This module allows
observation and forecast data from the AWN to be
ingested into the MIDDS. MIDDS is designed to
receive AWN data, identify desired stations and
products, and store the data in appropriate directories.
The number of active stations can be selected from the
master station database. Data requirements are usually
determined through the system administrator. MIDDS
ingests AWN data continuously, and a large volume of
data is received. Thus, the amount of data selected for
ingest must be determined very carefully.
LIGHTNING-DATA RECEIVER (LDR).
The LDR receives input from the Lightning Detection
and Tracking System (LDATS). The LDATS system
displays lightning data collected by the National
Lightning Detection Network (NLDN), which consists
of over 100 remote sensing stations that monitor cloud-
to-ground lightning in the continental United States.
The LDR receives LDATS data so that MIDDS can
display it on a user-defined map background. This
display can be an individual LDATS product or
overlaid on top of radar and satellite products. MIDDS
can also display the lightning data at specified time
Weather Group Applications Software
The primary function of MIDDS is to display
satellite imagery, radar imagery, alphanumeric text, and
weather charts. MIDDS has several data-display
applications available for weather briefings, along with
numerous other data manipulation and display features.
The main display applications in MIDDS are SAND
(Satellite, AFOS, NEXRAD, and DIFAX) and FOS
(Family of Services).
SAND (SATELLITE, AFOS, NEXRAD, and
DIFAX).The SAND application is used to display
three types of products: Satellite imagery, NEXRAD
(WSR-88D next-generation radar data), and digital
facsimile data. AFOS is the commercial way of