'Meteor scatter' diaporamas de présentation

WSJT: A software package for VHF DXers

WSJT: A software package for VHF DXers. WSJT: What is it?. WSJT = W eak S ignal by K1 JT Developed by Joe Taylor, K1JT Supports two digital modes: FSK441 for meteor-scatter JT44 for extremely weak signals Uses computer soundcard Requires no fancy equipment.

780 views • 77 slides

VHF-band RFI in Geographically Remote Areas

VHF-band RFI in Geographically Remote Areas. Judd D. Bowman Hubble Fellow, Caltech Alan E. E. Rogers Haystack Observatory With support from: CSIRO/MRO and Curtin University Thanks to: The organizers and Murray Lewis and the NSF 31 March 2010 RFI2010 Groningen. Outline.

447 views • 33 slides

Propagation VHF and Above

Propagation VHF and Above. (an overview only). Rick Bandla (VE3CVG). Radio Waves. Electromagnetic Waves composed of equal electric and magnetic power levels Travel in straight lines more or less like light Change direction if/when encounter atoms, molecules, ions, electrons.

361 views • 27 slides

Introduction to Meteor Scatter Operation

Introduction to Meteor Scatter Operation. by Marc C. Tarplee, Ph.D. N4UFP. Meteor Scatter Theory. Introduction. The earth is bombarded 24/7 by small meteors They generally arrive from a variety of directions They arrive with random velocities reaching up to 70 km/sec (45 mi/sec).

332 views • 25 slides

Digital VHF Weak Signal Modes

229 views • 21 slides