1-21.
When are black pilot balloons used for a
Pibal observation?
1.
Clear sky
2.
Low-overcast sky
3.
Hazy sky
4.
High-overcast sky
1-22.
Why are upper-air reports coded in a
numerical form?
1.
The information may be decoded
internationally
2.
A large amount of information can be
transmitted by using only a few
numbers
3.
The code can be easily ingested into a
computer
4.
All of the above
1-23.
When Part A of an upper-air report is
transmitted from a mobile land site, what is
the identifier group of the message?
1.
IIAA
2.
TTAA
3.
UUAA
4.
LLAA
1-24.
If only one upper-air observation is
conducted per day, for what synoptic hour
is the observation conducted?
1.
0000Z only
2.
1200Z only
3.
0000Z or 1200Z, whichever is closer
to local sunrise
4.
0600Z or 1800Z, whichever is closer
to local sunrise
1-25.
What parts of the TEMP code contain data
for the standard atmospheric pressure
surfaces?
1. Parts A and B
2. Parts A and C
3. Parts B and D
4. Parts C and D
3
