摘要:

Hourly means of solar‐flare effects, or crochets, in magnetic horizontal intensity (H) at Huancayo exhibit, during daylight, a diurnal variation like that inH. This variation is expected, since McNish showed [see 1 of “References” at end of paper] that flares produce magnetic effects indistinguishable from those which would result from an increase in strength of the current system responsible for the normal magnetic diurnal variation,Sq. On the other hand, it is found that the average crochet size inHis greater by a statistically significant amount for groups of days with greaterSqamplitude. For example, the average crochet size is 80 per cent larger for a group of 49 days with average δW2= 25.2 (Bartel's measure of amplitude ofSq) than for a group of 48 days with average δW2= 1.6. Although δW2increases with sunspot number, the crochet size does not. Thus, the larger average size of crochets, at Huancayo, on days whenSqis larger, indicates that the strength of the wind system is, on the average, greater on days with largerSq. From the change in crochet size, the strength of the wind system must vary by 50 per cent

ISSN:0148-0227    

DOI:10.1029/JZ061i001p00093

年代:1956

数据来源: WILEY

摘要:

A practical and accurate method for reducingP′‐ƒ records to electron densitiesvstrue height is described and used to analyzeP'‐frecords taken at White Sands. Direct measurements of electron densities in the ionosphere obtained with the aid of rockets are used to check the method. Results obtained by these two independent techniques are shown to be in excellent agreement. TwentyP′‐ƒ records were reduced for the period from 1948 to 1954, all of which reveal a considerable degree of regularity in the height of the daytimeE1andF2regions. Some of the profiles obtained are shown. One of the illustrations shows a one‐hour sequence, where theF2virtual height varied from 650 km to 410 km, whereas the true height remained essentia

ISSN:0148-0227    

DOI:10.1029/JZ061i001p00107

年代:1956

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JZ061i001p00129

年代:1956

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JZ061i001p00132-01

年代:1956

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JZ061i001p00133

年代:1956

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JZ061i001p00135

年代:1956

数据来源: WILEY

摘要:

The preliminary results of the subsequent arctic flights by members of the Geophysics Research Directorate and of the 6520th Test Group are presented.

ISSN:0148-0227    

DOI:10.1029/JZ061i001p00136

年代:1956

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JZ061i001p00139

年代:1956

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JZ061i001p00143-03

年代:1956

数据来源: WILEY

ISSN:0148-0227    

DOI:10.1029/JZ061i001p00144-07

年代:1956

数据来源: WILEY