Information Technology Reference
In-Depth Information
•
comprehension of community vocabularies
•
appreciation of different scientific techniques employed during the production
of data, their limitations and comparative success rates for picking up desired
phenomena.
•
knowledge of atmospheric events or processes which may be affecting the
atmospheric state being measured within a data set.
It is the appraisal of this knowledge base as permanent attributes of the Designated
Community which will determine whether it is necessary to preserve this informa-
tionbyinclusioninanAIP.
If we take an example from the ionospheric data set we can see how the
Designated Community determines what needs to be included within an AIP.
The figure below is take from an html page which contains a structural descrip-
tion of ionospheric parameters which have been encoded within IIWG formatted
files.
Upon inspection we can see that the current structural description contains
FORTRAN notation (Fig.
14.2
). If knowledge of FORTRAN is not deemed to be a
permanent stable attribute of the community this information must then be included
directly within the AIP. This ensures the structural description can be interpreted
correctly in the future.
Record #
Format
Description
1
A30
Station Name
1
A5
Station code
1
I4
Meridian time used by station
1
F5.1
Latitude N
1
F5.1
Longitude E
1
A10
Scaling type: Manual/ Automatic
1
A10
Data editings: Edited/ Non-edited/ Mixed
1
A30
Ionosonde system time
2, 3
30I4*
Year
Month
Number of days in the month, M
Number of characteristics
Total number of measurements
Number of measurements for each of the M days, NM
4, i
12A10*
List of characteristics
i+1, j
12A10*
Dimensions
j+1, k
60A2*
List of corresponding URSI codes
k+1, l
20(3I2)*
The NM sample times HHMMSS for each of the M days
I+1, m
24(I3, A2)* The N1 values of characteristic 1 for day 1
.....
...
... repeated for each of the M days
m+1
24(I3, A2)
Hourly medians for characteristic 1
m+2
24(I3, A2)
The counts for the hourly medians, Range
m+3
24(I3, A2)
Upper quartile
Fig. 14.2
Structural description information
