Determination of the Auroral Oval Q Index from the Air Weather Service K Index PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Determination of the Auroral Oval Q Index from the Air Weather Service K Index PDF full book. Access full book title Determination of the Auroral Oval Q Index from the Air Weather Service K Index by B. S. Dandekar. Download full books in PDF and EPUB format.
Author: B. S. Dandekar
Publisher:
ISBN:
Category : Geomagnetic indexes
Languages : en
Pages : 36
Get Book Here
Book Description
Author: B. S. Dandekar
Publisher:
ISBN:
Category : Geomagnetic indexes
Languages : en
Pages : 36
Get Book Here
Book Description
Author: B. S. Dandekar
Publisher:
ISBN:
Category : Geomagnetic indexes
Languages : en
Pages : 0
Get Book Here
Book Description
The AWS determines the auroral oval diameter in real time as a function of the Kp index from the particle precipitation measured aboard Defense Meteorological Satellites (DMSP). For the Q index needed to drive the auroral algorithm in the AWS polar ionospheric model, Hardy determined a relation between the Kp and the Q index. The analysis indicates that the auroral oval index Q computed from the AWS-K is overestimated. A least-squared deviation circle is fitted to the data base used in the Hardy algorithm. Using a four-year data set of Kp and Q observations, a new relation between the planetary magnetic activity index Kp and Q is determined to rectify this overestimation of the Q index. The new relation is :Q=0.964 Kp-0.3 for Kp2 + and 0=2.04 Kp-2.7 for Kp2 +. The improved, more precise Q values obtained from this relation will improve prediction of the auroral oval phenomena that affect the performance of the real time operational systems.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 700
Get Book Here
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1690
Get Book Here
Book Description
Author: B. S. Dandekar
Publisher:
ISBN:
Category : Auroras
Languages : en
Pages : 40
Get Book Here
Book Description
The K index determined by the Air Force Global Weather Central has been compared with Kp and Q (from Sodankyla) for the period March 1978 - May 1981 to determine empirical relations between Kp vs K, Q vs Kp, and Q vs K. The study shows that the K index is a reasonably good measure of Kp during most of the time. The time-dependent relations between Q and K, and Kp and K are derived, so that one can convert the K (AFGWC) index to the Kp or Q index for specification of the auroral ionosphere in the Experimental Radar System test region.
Author:
Publisher:
ISBN:
Category : Environmental geology
Languages : en
Pages : 42
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 810
Get Book Here
Book Description
Author: B. S. Dandekar
Publisher:
ISBN:
Category : Ionospheric radio wave propagation
Languages : en
Pages : 110
Get Book Here
Book Description
Author: David A. Hardy
Publisher:
ISBN:
Category : Algorithms
Languages : en
Pages : 0
Get Book Here
Book Description
In support of the Global Weather Central of the Air Weather Service, we have developed computer techniques to determine, in near real time, the equatorward boundary of the auroral oval using the data from the SSJ/3 sensors flown on board the DMSP satellites. The boundary is determined on both the morning and evening sides of the oval and in both northern and southern auroral zones. Three tests are used in the boundary determination, one on the evening side and two on the morning side of the auroral oval. On the evening side of the auroral zone, since low energy particles always are observed at the lowest latitude, the boundary is determined by testing the summed counts in the six channels of the SSJ/3 detector covering the energy range from 110 eV to 1000 eV. The boundary is chosen when the summed counts exceed 30 for 3 successive seconds. The data are always tested as a function of increasing magnetic latitude. On the morning side, high energy electrons are always observed first. Since the channels measuring high energy electrons may be contaminated by penetrating particles from the ring belts, two tests are required. The first test picks the boundary at the point where three successive ratios of 4-sec averages of channel 8 to channel 9 are less than 5. The second test chooses the boundary where the ratio of the summed counts in channels 1 through 4 of the SSJ/3 sensor to channels 5 through 8 exceeds 1.5 or is less than 0.5 for 3 successive seconds.
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1016
Get Book Here
Book Description
