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Aviation Weather Observation
Chapter 1-General
39
Meteorology
Professional
11/01/2012

Additional Meteorology Flashcards

 


 

Cards

Term
What is the order of elements in a METAR report?
Definition
  1. Type (METAR/SPECI)
  2. Site ID
  3. Date
  4. Modifier (AUTO/COR)
  5. Wind
  6. Visibility
  7. Weather
  8. RVR
  9. Sky condition
  10. Temperature
  11. Altimeter setting
  12. Remarks

1-2

Term
How often must one do time (accuracy) checks on the official station clock?
Definition

For part time stations: daily; for full-time: once per shift.

 

Section 1-1

 

 

 

 

Term
How long must the station retain carbon copies of forms?
Definition

90 days (unless specified by local guidelines)

 

A-1

Term
What if SPECI criteria are met at the time of a normal METAR?
Definition

Code it as METAR anyway.

 

1-2

Term
Where does the station ID go in the report?
Definition

Second, after the type.

 

1-2

Term
What determines the time used in the METAR report?
Definition

The actual time of a METAR report is the time the last

element of the observation was observed.

 

1-3

Term
What determines the time of a SPECI report?
Definition

The actual time of a SPECI report is when the criterion for a SPECI is met or noted.

 

1-3

Term
What is the maximum allowable time before the scheduled observation time that one can begin taking the ob?
Definition

15 minutes.

 

 

Term

What are the designators used on coded aviation weather observations for the following types of

reports?

 

a. Routine report

b. Unscheduled report

Definition

a. Metar

b. Speci

 

1-2

Term
What time format is used in column 2 of the form?
Definition

A check mark must also be placed in one of the time standard boxes in column 2. The block to be checked depends on the observing

program. An A-PAID is required to check the LST block, while a SAWRS will check the UTC block. Time of the observation in the

transmitted report will always be in UTC (Z).

 

CH 1. PG 11

Term
The time of observation used in a transmitted report is in:
Definition

UTC

 

CH 1. PG 11

Term

If you discover an error in column 9 after you have given the observation to the tower, you should correct the error by:

 

a. erasing the erroneous entry and enter the correct data in red,

b. erasing the erroneous entry and enter the correct data in black,

c. drawing a line through the erroneous entry and enter the correct data in red, or

d. drawing a line through the erroneous entry and enter the correct data in black

Definition

Whether the error was discovered before or after the dissemination of the observation, correct

the erroneous data by clearly drawing a single line through the error.

 

CH 1. PG 2

 

Term

When conditions are relatively unchanged, which element will determine the time of a METAR?

Definition

Altimeter

 

CH 1. PG 4

Term
A metar observation contains_____sections,_______.
Definition
2, the body of the report and the remarks
1.8.1
Term
Regardless of the delay, observations containing which of the following elements shall be disseminated?
Definition
Volcanic Eruptions
Term
Which element can NEVER be estimated?
Definition
ALTIMETER
TEMP AND DEW POINT
RUNWAY VISUAL RANGE
Term
How many letters does and ICAO identifier use?
Definition
Four (hint-the acro "ICAO" has the same number of letters)
Term
An observation is taken on the 7th of the month at 3:50a.m. LST. the stations time conversion is +6. How would this be coded for transmission?
Definition
070950Z
Term
Which report will contain the date and time group?
Definition
Both Metar and Speci

CH1. PG7
Term
In a metar report, the time of the Date/Time group will be:
Definition
The time the last element was observed
Term
A SPECI observation contains______ section, _______.
Definition
2, the body of the report and remarks.
Term
In a SPECI report, the time of the Date/Time group will be:
Definition
When the criteria for a SPECI is met or noted
Term
Which time will be used for the Date/Time group if the report is a corrected one?
Definition
same time used in the report being corrected
Term
In a manual observation, what is the only report modifier used?
Definition
COR
Term
Corrected reports are NOT transmitted if they are:
Definition
Superseded by a later report.
Term
People authorized to take weather observations:
Definition
Must be certified to by the national weather service.
Term
If an element does not occur or cannot occur or cannot be observed, it is:
Definition
Omitted from the report
Term
When the prevailing visibility is exactly halfway between two reportable values, you should select the:
Definition
Lower of the two values.

CH1. PG5
Term
When conditions are relatively unchaning, the order of evaluating elements is:
Definition
Outdoor
Indoor
Pressure(altimeter)
Term
An altimeter reading of 29.248 inches would be rounded to:
Definition
29.24
Term
When computations require the disposal of decimals of negative numbers, and the decimal to be disposed of is five, the preceding digit will:
Definition
Remain Unchanged
Term
When the height of a cloud base falls half way between 2 reportable values the ____ value shall be reported.
Definition
Lower
Term
Elements included in an observation must have been observed within _____ minutes.
Definition
15
CH1.Pg5
Elements entered shall have been observed within 15 minutes of the actual time of observation.
Term
What remark is appended to the report to indicate the observation was not tranmitted long-line?
Definition
FIBI (Filed but impractical to transmit)

CH1. Pg9
Term
An observation is taken on the 24th of the month at 05:52p.m. LST. The station's time conversion is +8. How would this be coded?
Definition
250152Z
Term
When very little changes occur to weather conditions, which element will be evaluated last?
Definition
Altimeter
Term
Which element can be estimated?
Definition
Sky Condition
Term
Which of the following temperatures were rounded correctly?

1.5=01
-1.5=-01
-2.6=-02
-2.4=-03
Definition
-1.5=-01
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