What does GREY line mean?
Filters. The narrow band of dusk and dawn that separates the areas in daylight from those in darkness throughout the world. noun.
What is the GREY line in ham radio?
Line, as utilised by Ham Radio operators over the world. For those who don’t know, the”grey line” is a band around the Earth that separates daylight from darkness as the earth rotates. Propagation along this line can be very efficient.
What is the gray line on maps?
“The grey line indicates that Google Maps does not have enough information about what transport method was being used between those times. It could be due to movement, or the device being turned off and on again, or just poor signal on the wifi/4g/gps connections it was using to determine the location.”
What is GREY line propagation?
Grey line or gray line propagation is a form of radio signal propagation that provides surprisingly long distance radio communications at dawn and dusk sometimes when other forms of ionospheric propagation may not be expected to provide signal paths of these distances.
Is it grey or gray area?
‘Gray’ and ‘grey’ are two different ways to spell the same word. ‘Grey’ is more commonly used in the UK, Ireland, and other places that use British English, although grey is also considered correct. ‘Gray’ is the more popular spelling in America and countries which use American spelling.
What is GREY line of eyelid?
Gray line (intermarginal sulcus): the gray line represents the muscle of Riolan, the most superficial aspect of the orbicularis oculi. It arises from the orbital division of the orbicularis oculi. Meibomian gland orifices. Mucocutaneous junction.
How accurate is Google timeline?
Originally Answered: How accurate is Google Maps and Timeline? Very accurate,the timeline is based on the Gps signal from your phone (if the GPS is on),and the Maps are pretty accurate as well,depending on what part of the planet you are.
Is gray incorrect?
“Gray” and “grey” are two different ways of spelling the word; neither is technically “right.” There’s no difference in its meanings, and each comes from the same word: the Old English “grǽg.” Throughout the 14th century, examples appear of the word being spelled as both “greye” and “graye” in prominent works of …
Is it gray or grey in Australia?
They refer to a color of a neutral tone between black and white, and can also be used metaphorically to convey gloom and dullness. However, gray is the more popular spelling in the US, while grey reigns supreme in the UK as well as Ireland, Australia, and other places that use British English.
Why is propagation along the grey line efficient?
The “grey line” is a band around the Earth that separates daylight from darkness. Propagation along the grey line is very efficient. One major reason for this is that the D layer, which absorbs HF signals, disappears rapidly on the sunset side of the grey line, and it has not yet built upon the sunrise side.
What is the grey line on the map?
Grey Line Map The “grey line” is a band around the Earth that separates daylight from darkness. Propagation along the grey line is very efficient. One major reason for this is that the D layer, which absorbs HF signals, disappears rapidly on the sunset side of the grey line, and it has not yet built upon the sunrise side.
What is greygrey propagation?
Grey or gray line propagation is a form of HF radio propagation apparent at dawn and dusk where signals travelling along the line are heard at much higher strengths. Ionospheric propagation tutorial includes . . . .
How far do greygrey lines travel?
Grey line propagation is particularly noticeable on lower frequencies, for example the 3.5 MHz amateur radio band. Normally signals may be heard over distances of a few hundred kilometres in the day, and possibly up to or two thousand kilometres at night for those stations with good antennas.