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Table 6-9-2(B).-Vector Lengths in Centimeters for Map Scale 1:100,000 and Wind Speed in Kilometers-per-hour 1:100,000 km/h
Note: Above 18,000 meters, altitude layers for plotting vector diagrams continue to be at 2,000 meter intervals. However, the map distance factors vary so little that some of the columns in the above table are combined for convenience. Table 6-9-3(A).-Vector Lengths in Centimeters for Map Scale 1:250,000 and Wind Speed in Knots 1:250,000 knots
Note: Above 18,000 meters, altitude layers for plotting vector diagrams continue to be at 2,000 meter intervals. However, the map distance factors vary so little that some of the columns in the above table are combined for convenience. Table 6-9-3(B).-Vector Lengths in Centimeters for Map Scale 1:250,000 and Wind Speed in Kilometers-per-hour 1:250,000 km/h
Note: Above 18,000 meters, altitude layers for plotting vector diagrams continue to be at 2,000 meter intervals. However, the map distance factors vary so little that some of the columns in the above table are combined for convenience. from the Stabilized Cloud and Stem Parameters nomogram, shown in figure 6-9-3. To use the nomogram, you simply take a straightedge and connect the estimated or reported yield of the blast on the left with the identical figure on the right. Then, you read the cloud top-and bottom height and the 2/3 stem height along this line. Information on cloud radius and time of fall from the cloud base can also be determined from this nomogram.EXAMPLE: From figure 6-9-3, the following parameters were determined for a 50-kt yield:Cloud-top height 12,700 meters Cloud-bottom height 8,300 meters 2/3 stem height 5,500 meters Cloud radius 5 kilometers Time of fall 2,35 hours
Figure 6-9-3.-Stabilized cloud and stem parameters. The cloud top, bottom, and 2/3 stem heights are placed on the vector plot and labeled. Radial lines are then drawn between each of these points and GZ. See figure 6-9-4. The wind vectors between the 2/3 stem height and the cloud-top height are the vectors used in predicting the fallout area. If wind vectors between these two points extend outside the radial lines, you must expand the angle formed by the radial lines to include the outside vectors. An example of this is shown in figure 6-9-5. |
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