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3 - FTP Directory Listing - Nato

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Pressure 24<br />

altltude, 16<br />

Pressure 24<br />

altitude, ,6<br />

29<br />

1496 penelratlons 4239.5 mln 707 strikes<br />

Mean = 7.0 km<br />

Meon = 8.7 km<br />

3 (22 900 11)<br />

(29 600 11)<br />

40 Ll0<br />

0 80 240 400<br />

Penetration<br />

714 strlkes<br />

1496 penetratlor<br />

I<br />

u<br />

0 2 4 6 9 1 0<br />

Slrikeslpenetratlon<br />

,<br />

,200 to 4OOHegaHertz 50<br />

40OHegaHertz-lGlgaHertz 400 6<br />

1 to 3 GlgaHertz 200 6<br />

3 to 0 GlgaHertz 400 6<br />

18 to 30 GigaHertz<br />

0 200 600 1000 0 40 120 200<br />

Duration, mln Strikes<br />

714 strlkes 185 nearby llashes<br />

4239.5 mln Mean = 8.6 km<br />

c<br />

LL<br />

0 .30 .90 1.50 0 8 16 24 32 40<br />

Slri keslm in Nearbvs<br />

Fig 4 - THUNDERSTORH PENETRATIONS AND LIGHTNING STATISTICS<br />

AS A FUNCTION OF PRESSURE ALTITUDE FOR NASA STORM<br />

HAZARDS 1900- 1986 FROM PAPER 26 FISHER . USA<br />

EFFECT OF EXTERNAL RADIATIONS ON AIRCRAFT<br />

SYSTEMS<br />

(extracted from the J.A.A. Requirements applied to<br />

the A320 )<br />

The external threat frequency bands and corresponding<br />

average end peak levels that shall be used to establish<br />

the internal threat levels are defined as follows<br />

Frequency range<br />

600 6<br />

(28 100 tt)<br />

P<br />

30<br />

1-21

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