Learjet 60 - System Operation; Weather Mapping

Learjet 60

Pilot's Manual
SYSTEM
OPERATION
The Stormscope requires a warm-up
period of approximately 15 sec-
onds from initial power
on during which an automatic self-test is con-
ducted . If the self-test is
successful, "ALL TESTS ARE OKAY" will be
displayed on the Stormscope
CRT for approximately 3 seconds followed
by
the Main Menu . A manually
initiated self-test and a continual self-
test
capability are included in the system . If the
Stormscope should
fail
any test, an error message will appear on
the CRT indicating
which test
was failed and which functions
remain operational . The
Stormscope may still operate without the
failed function . Results of
the automatic
self-test, continual self-test, or
manual self-test can also
be accessed from the
OPTIONS mode .
The controls
around the Stormscope bezel include
an OFF/BRT con-
trol knob . The
remaining four buttons located
around the bottom of
the Stormscope
vary from mode to mode .
The CRT will display a but-
ton legend as appropriate
for each mode .
Unlabeled buttons will have
no function in that mode .
WEATHER
MAPPING
Displayed
electromagnetic discharges
associated with thunderstorm
activity appear as
+ signs on the Stormscope
CRT . The plus signs
are
reduced in
size as range is increased to
reduce clutter .
Thunderstorm
intensity appear as
varying shades of gray ;
light gray for
weak activi-
ty to black for
severe activity .
The CLEAR
button clears the
display and memory of
weather data .
Frequent
use of the CLEAR
key facilitates verification
of thunder-
storm data by
monitoring plus
sign reappearance .
Determining the
amount and
frequency of discharge
activity helps
in determining
the
build-up or
dissipation of a
thunderstorm cell .
Display discharges
are removed
from the screen after
2 minutes or
when the
CLEAR key is pressed .
When changing from
one range dis-
play to
another, no loss of data
will occur since
electrical discharge
in-
formation
is acquired and stored
on all ranges
simultaneously .
PM-123

5- 6 5
Change 2