Trace Extraction from Oblique Ionograms

نویسنده

  • Matthew Roughan
چکیده

Oblique sounding may be used to obtain information about the ionosphere, in the form of an electron density profile, near the mid-point of two sites. This makes it useful for recovering ionospheric data at a point at which, for reasons of economy or geography, vertical sounding cannot be conducted. The information may be used in providing real-time propagation advice either for over-the-horizon radar, or high frequency (HF) communication.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Oblique Ionograms Automatic Scaling Algorithm OIASA application to the ionograms recorded by Ebro observatory ionosonde

This is anOp Abstract – The oblique ionograms automatic scaling algorithm (OIASA), developed at the INGV for the identification of trace of oblique ionograms, allows the determination of the maximum usable frequency (MUF) for communication between the transmitter and receiver, automatically rejecting poor quality ionograms. A test of the algorithm using data from a campaign of oblique soundings...

متن کامل

The Autoscaling of Oblique Ionograms

This report details the work done on developing an autoscaling system for the LowLatitude Ionospheric Sounding Program (LLISP). The report firstly describes the performance of a number of different filtering routines for automatic cleaning of LLISP oblique ionograms. Secondly, it then presents techniques developed to automatically extract a feature vector from a filtered ionogram. A third stage...

متن کامل

Validation of electron density profiles derived from oblique ionograms over the United Kingdom

Inversion algorithms are available to derive the vertical electron density profile at the mldpoint of an oblique sounder path. The techniques open up the possibility of monitoring the ionosphere at otherwise inaccessible locations, such as over sea or inhospitable terrain. A new method of monitoring the ionosphere based on radio tomography can be used to create two-dimensional images of electro...

متن کامل

Interobl: An interactive software tool for displaying and scaling oblique ionograms

By analyzing an oblique ionogram several characteristics, such as LOF, MOF, FMUF, FHLOF, FLLOF, and 2FMOF, can be found. These characteristics are important both for ionospheric studies and for terrestrial communication purposes, as they give information about the sky wave communication conditions in the High Frequency (HF) radio spectrum. A RCS-5B sweeping HF receiver for oblique sounding was ...

متن کامل

Sporadic-E associated with the Leonid meteor shower event of November 1998 over low and equatorial latitudes

Rapid radio soundings were made over Ahmedabad, a low latitude station during the period 16–20 November 1998 to study the sporadic-E layer associated with the Leonid shower activity using the KEL Aerospace digital ionosonde. Hourly ionograms for the period 11 November to 24 November were also examined during the years from 1994 to 1998. A distinct increase in sporadic-E layer occurrence is noti...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003