But I AM a penis. I'm a ME/HE/HIM/US/.
Then again, I'm just an employ like you, so you know, we're ALL "IT" these days.
GPS Spoofing... Watch your Assets.
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Then again, I'm just an employ like you, so you know, we're ALL "IT" these days.
YOU are the only one of the TWO of us in this convo who employed a derogatory name. So, rectify that, while you clamber back up into the saddle of that high horse of your'n.
I was talking about GPS Spoofing. What was YOUR point again???
Screaming_Emu
Joe Conventional
It’s not a horse, it’s an alpaca.
Yeah, petitioning Gravity with prayer is always sound technique in the advancement of aviation safety and crew competence. 'Specially when one gets bored from monitoring all those confusing and bothersome cockpit gauges.
Screaming_Emu
Joe Conventional
What?
Not necessarily germane, but one of the minor annoyances of being on staff is that I can't utilize the Ignore function.
Screaming_Emu
Joe Conventional
In this case I have mixed feelings. Occasionally the poster in question has some decent things to say, you just have to sift through a bunch of “other” to find it.
I generally don't like the ignore function because I’d like to think I’m enough of an adult to be the better person. But there are a few that seem to know just how to press my buttons in a way that makes me want to be a person I’m not exactly proud of, so….
Same, same.
I probably need to be more tolerant. I'll work on that...maybe tomorrow.
CoffeeIcePapers
Well-Hung Member
But you can ignore him for everyone, permanently.
inigo88
Composite-lover
Interpersonal communication issues aside, the OP’s link was good. Avionics manufacturers have to get their crap together and make their INS and DME/DME triangulation a truly redundant backup rather than turning itself off because their bad software got confused.
Also, this type of GPS spoofing is literally the plot of Tomorrow Never Dies. Surprised it’s taken this long.
Also, this type of GPS spoofing is literally the plot of Tomorrow Never Dies. Surprised it’s taken this long.
For all the detractors...Interpersonal communication issues aside, the OP’s link was good. Avionics manufacturers have to get their crap together and make their INS and DME/DME triangulation a truly redundant backup rather than turning itself off because their bad software got confused.
Also, this type of GPS spoofing is literally the plot of Tomorrow Never Dies. Surprised it’s taken this long.
View attachment 74061
At the end of the day, I'm here to help... Whether you want help or not.
inigo88
Composite-lover
Here’s probably the nerdiest thing you’ll read today. The SR-71 Blackbird had an Astroinertial Navigation System (ANS) which was an INS that used a star-tracker telescope on top to update its position using celestial navigation. The ANS was a white box loaded behind the pilots so they nicknamed it R2-D2.
From “The Complete Book of the SR-71 Blackbird: The Illustrated Profile of Every Aircraft, Crew, and Breakthrough of the World's Fastest Stealth Jet”
https://a.co/d/3bV4SAH
Star tracking was automatic and the ANS computer picked which star to track as a function of latitude, longitude, day of the year, time of day, pitch and roll attitude and location of the sun. The computer then selected a star by going through a catalog of available stars arranged in decreasing brightness until it found one.
“On the RSO’s ANS panel, an illuminated star “ON” light indicated that a minimum of two stars had been tracked within the last five minutes…”
“…By comparing the position of the stars to their known locations, and with the exact time of day [they had a highly accurate chronometer on board pre-GPS], the ANS could then compute the aircraft’s precise location. A normal gyro compass alignment of the ANS required thirty-six minutes of warm up time and provided the SR-71 with a great-circle navigational accuracy 1,885 ft (0.3 nm) for up to ten hours of flying time.”
TL;DR - it’s astounding what we knew how to do back in the 1960s, it blows my mind that we could do this pre-GPS. Now that we have GPS it has become this embarrassing crutch that we can’t live without and an excuse for world governments to ditch maintaining land-based navaids that we should really be holding onto for redundancy. But unlike the article in the original post, the SR-71 ANS is a shining example of how to properly supplement INS, even in a way that required no land-based navaid back up.
P.S. if like me you think this subject matter is cool, buy the book. It’s awesome!
From “The Complete Book of the SR-71 Blackbird: The Illustrated Profile of Every Aircraft, Crew, and Breakthrough of the World's Fastest Stealth Jet”
https://a.co/d/3bV4SAH
Star tracking was automatic and the ANS computer picked which star to track as a function of latitude, longitude, day of the year, time of day, pitch and roll attitude and location of the sun. The computer then selected a star by going through a catalog of available stars arranged in decreasing brightness until it found one.
“On the RSO’s ANS panel, an illuminated star “ON” light indicated that a minimum of two stars had been tracked within the last five minutes…”
“…By comparing the position of the stars to their known locations, and with the exact time of day [they had a highly accurate chronometer on board pre-GPS], the ANS could then compute the aircraft’s precise location. A normal gyro compass alignment of the ANS required thirty-six minutes of warm up time and provided the SR-71 with a great-circle navigational accuracy 1,885 ft (0.3 nm) for up to ten hours of flying time.”
TL;DR - it’s astounding what we knew how to do back in the 1960s, it blows my mind that we could do this pre-GPS. Now that we have GPS it has become this embarrassing crutch that we can’t live without and an excuse for world governments to ditch maintaining land-based navaids that we should really be holding onto for redundancy. But unlike the article in the original post, the SR-71 ANS is a shining example of how to properly supplement INS, even in a way that required no land-based navaid back up.
P.S. if like me you think this subject matter is cool, buy the book. It’s awesome!
YUP!!!!Here’s probably the nerdiest thing you’ll read today. The SR-71 Blackbird had an Astroinertial Navigation System (ANS) which was an INS that used a star-tracker telescope on top to update its position using celestial navigation. The ANS was a white box loaded behind the pilots so they nicknamed it R2-D2.
From “The Complete Book of the SR-71 Blackbird: The Illustrated Profile of Every Aircraft, Crew, and Breakthrough of the World's Fastest Stealth Jet”
https://a.co/d/3bV4SAH
Star tracking was automatic and the ANS computer picked which star to track as a function of latitude, longitude, day of the year, time of day, pitch and roll attitude and location of the sun. The computer then selected a star by going through a catalog of available stars arranged in decreasing brightness until it found one.
“On the RSO’s ANS panel, an illuminated star “ON” light indicated that a minimum of two stars had been tracked within the last five minutes…”
“…By comparing the position of the stars to their known locations, and with the exact time of day [they had a highly accurate chronometer on board pre-GPS], the ANS could then compute the aircraft’s precise location. A normal gyro compass alignment of the ANS required thirty-six minutes of warm up time and provided the SR-71 with a great-circle navigational accuracy 1,885 ft (0.3 nm) for up to ten hours of flying time.”
View attachment 74067
View attachment 74068
TL;DR - it’s astounding what we knew how to do back in the 1960s, it blows my mind that we could do this pre-GPS. Now that we have GPS it has become this embarrassing crutch that we can’t live without and an excuse for world governments to ditch maintaining land-based navaids that we should really be holding onto for redundancy. But unlike the article in the original post, the SR-71 ANS is a shining example of how to properly supplement INS, even in a way that required no land-based navaid back up.
P.S. if like me you think this subject matter is cool, buy the book. It’s awesome!
But WHY "nerdy"? It's the basics of EVERYTHING all the machines that go "ping" actually do. That's not nerdy. That's first grade ... or at least it ought to be.
Anyone else here ever had to take a celestial navigation course? (Yeah, upcoming bashers, I know it's not everyday practical or state of the art anymore. But it sure gives one the basics and foundations of time/speed/distance, and maybe just maybe, a more accurate sense of humanity's real place in the universe. Also, nice to have in the quiver in a pinch.)
Here’s probably the nerdiest thing you’ll read today. The SR-71 Blackbird had an Astroinertial Navigation System (ANS) which was an INS that used a star-tracker telescope on top to update its position using celestial navigation. The ANS was a white box loaded behind the pilots so they nicknamed it R2-D2.
From “The Complete Book of the SR-71 Blackbird: The Illustrated Profile of Every Aircraft, Crew, and Breakthrough of the World's Fastest Stealth Jet”
https://a.co/d/3bV4SAH
Star tracking was automatic and the ANS computer picked which star to track as a function of latitude, longitude, day of the year, time of day, pitch and roll attitude and location of the sun. The computer then selected a star by going through a catalog of available stars arranged in decreasing brightness until it found one.
“On the RSO’s ANS panel, an illuminated star “ON” light indicated that a minimum of two stars had been tracked within the last five minutes…”
“…By comparing the position of the stars to their known locations, and with the exact time of day [they had a highly accurate chronometer on board pre-GPS], the ANS could then compute the aircraft’s precise location. A normal gyro compass alignment of the ANS required thirty-six minutes of warm up time and provided the SR-71 with a great-circle navigational accuracy 1,885 ft (0.3 nm) for up to ten hours of flying time.”
View attachment 74067
View attachment 74068
TL;DR - it’s astounding what we knew how to do back in the 1960s, it blows my mind that we could do this pre-GPS. Now that we have GPS it has become this embarrassing crutch that we can’t live without and an excuse for world governments to ditch maintaining land-based navaids that we should really be holding onto for redundancy. But unlike the article in the original post, the SR-71 ANS is a shining example of how to properly supplement INS, even in a way that required no land-based navaid back up.
P.S. if like me you think this subject matter is cool, buy the book. It’s awesome!
The FB-111A Aardvark, the Strategic Air Command medium bomber version, used a Litton ASQ-119 Astro tracker also, for the same reason for the INS. It was mounted ahead of the windscreen.
I got to visit this place back before Mather AFB closed in Sacramento due to the 1988 BRAC. Mather was the home of USAF Navigator training, and for the guys who took the table navigator track (as opposed to the Weapons System Officer or Electronic Warfare Officer tracks), they took their celestial navigation ground school is the Spitz Planetarium they had on base there, kind of an IMAX-style facility. Way cool facility to see.
CFI A&P
Exploring the world one toilet at a time.
Apparently those units come up for auction from time to time.
Litton Astrotracker SU-42/ASQ-119 Astrocompass | RR Auction
Sold for $1,553 | Large and impressive Litton SU-42/ASQ-119 'Astrotracker' astrocompass used for navigational purposes as part of the avionics suite
CFI A&P
Exploring the world one toilet at a time.
The FAA does have a navigator certificate, a carryover from the days of have an engineer and navigator onboard. Ten years ago there were only 126 active navigator certificates, as of 2022 there are only 29.
The Flight Navigator certificate. Have always wondered if graduates of USAF or USN Navigator school could mil-comp those.
BEEF SUPREME
Well-Known Member
Never took a course but I taught myself celestial navigation while working aboard the tall ship Alvei. At the time I was a super nerd disguised as a surfer. The working on different sailing ships was a neat way to see the world and I had always wanted to teach myself celestial nav. We were at sea so much on Alvei I had enough time to figure it out. I had a cheap sextant. Pretty sure it was plastic. A small handheld HF radio for a time hack. H0249 the air navigation tables and a how to book: Celestial Navigation for Yachtsmen, by Mary Blewitt. And the nautical almanac. By the end of my time on Alvei I could reliably shoot stars, the planets and the sun. I never could figure out how to shoot the moon. The math was too hard for me to sort out on my own. Maybe with some help I could have figured it out.
I could fix my position within about 3-5 miles. Not bad for an idiot.
Fun fact: HO229 was the tables for navigation at sea, HO249 for air. The sea tables were extra complex for a better position fix and was considered by everyone as overly complicated.
Yes. Mary Blewitt is a real name as far as I know.
I could fix my position within about 3-5 miles. Not bad for an idiot.
Fun fact: HO229 was the tables for navigation at sea, HO249 for air. The sea tables were extra complex for a better position fix and was considered by everyone as overly complicated.
Yes. Mary Blewitt is a real name as far as I know.