Recent content by francis39

[ QUOTE ] Any battery monitor that uses a shunt to measure Amps in and out cannot give you a true reading of remaining battery capacity. [/ QUOTE ] That may be true for a system that just measures only amps with a shunt. According to the handbook, the NASA BM1 measures volts AND amps, and...

[ QUOTE ] Well, it seems to me that Robin was spot on! Francis, consider yourself 'radar' identified! [/ QUOTE ] Its a fair cop, Guv! I have to confess to having some connection with NASA! I met them last year when my wife and I were visiting the White Cliffs National Trust site. NASA were...

[ QUOTE ] The nasa radar will continuously track up to 30 vessels. [/ QUOTE ] Yes, and they are the 30 <u>nearest</u> vessels, not just a random selection of 30 detectable vessels. If there are only 29, it must be because there are only 29 within detection range, surely?

I've started again because the previous thread on this topic was getting silly IMHO. For example: [ QUOTE ] ... terrible promotion of what could be nice kit, with dreadful terminology. I hope the product dies, and they are reading this thread. [/ QUOTE ]They probably are, but are too grown...

"Real" radars using a whirly bit on for less than £1000 - have very poor angular resolution because they have a wide beam width - 7 degrees or more (limited by physics and the size of the antenna). As a result, the display barely resembles a map, let alone a dog's dinner. And it has to be said...

There have been lots of comments about whether it is or isn't a "real" radar. Some have argued it can't be because they have found lots of dictonary references which suggest (amongst other things): Definition: [n] measuring instrument in which the echo of a pulse of microwave radiation is used...

Re: A good analogy but not complete I wouldn't mind betting NASA thought about calling it a WIreless, Non-TRansmitting Ais Position display (a WINTRAP) or maybe a Non-transmitting Ais-Showing Radar-thingy (a NASA-NASR), a Direction Information And Position Electronic Recorder (a DIAPER), a...

Re: Nasa AIS \"Radar\" questions answered [ QUOTE ] So I guess NASA is going for a re-definition of RADAR then..... [/ QUOTE ] ...No, I think you and your pedantic dictionaries are. RADAR was an acronym invented in the 2nd World War to describe RAdio Direction And Range. I agree it...

I'm sure it's got a two-channel receiver: the bottom screen shot on NASA's web page seems to show you can choose which channel (A or B) to use. If it was just a repeater, what would it be repeating? <hr width=100% size=1>

Their website is http://www.nasamarine.com but the "What's new" button on the site doesn't do anything! They seem to be good at hiding their light under a bushel. I was looking for something else, and noticed a blank(!) picture mentioning the new AIS radar up in the top right-hand corner, so...

I saw what must have been a prototype of this new AIS "radar" on test near Dover some while ago, and now NASA's put it on their website. It looks the business, but I hadn't realised all the facilities it offers. They don't say when I can buy one, though. <hr width=100% size=1>

I’ve seen one of these under test near Dover! It was probably a prototype, in the same package as the 16-line NAVTEX Pro. It was connected to a handheld GPS to provide the receiver position. But what it does is show some AIS messages as text as they come in. The messages they display seem to...