Transionospheric Propagation Code (TIPC)
The Transionospheric Propagation Code is a computer program developed at Los Alamos National Lab to perform certain tasks related to the detection of vhf signals following propagation through the ionosphere. The code is written in Fortran 77, runs interactively and was designed to be as machine independent as possible. A menu format in which the user is prompted to supply appropriate parameters for a given task has been adopted for the input while the output is primarily in the form of graphics. The user has the option of selecting from five basic tasks, namely transionospheric propagation, signal filtering, signal processing, DTOA study, and DTOA uncertainty study. For the first task a specified signal is convolved against the impulse response function of the ionosphere to obtain the transionospheric signal. The user is given a choice of four analytic forms for the input pulse or of supplying a tabular form. The option of adding Gaussian-distributed white noise of spectral noise to the input signal is also provided. The deterministic ionosphere is characterized to first order in terms of a total electron content (TEC) along the propagation path. In addition, a scattering model parameterized in terms of a frequency coherence bandwidth is also available. In the second task, detection is simulated by convolving a given filter response against the transionospheric signal. The user is given a choice of a wideband filter or a narrowband Gaussian filter. It is also possible to input a filter response. The third task provides for quadrature detection, envelope detection, and three different techniques for time-tagging the arrival of the transionospheric signal at specified receivers. The latter algorithms can be used to determine a TEC and thus take out the effects of the ionosphere to first order. Task four allows the user to construct a table of delta-times-of-arrival (DTOAs) vs TECs for a specified pair of receivers.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOD
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6357856
- Report Number(s):
- LA-11799-MS; ON: DE91002435
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
IONOSPHERE
WAVE PROPAGATION
DETECTION
COMPUTER ARCHITECTURE
ELECTROMAGNETIC PULSES
FLOWSHEETS
FORTRAN
MHZ RANGE
SCATTERING
SIGNAL CONDITIONING
T CODES
COMPUTER CODES
DIAGRAMS
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
FREQUENCY RANGE
PLANETARY IONOSPHERES
PROGRAMMING LANGUAGES
PULSES
RADIATIONS
657002* - Theoretical & Mathematical Physics- Classical & Quantum Mechanics
990200 - Mathematics & Computers
640201 - Atmospheric Physics- Auroral
Ionospheric
& Magetospheric Phenomena