The "To Keep Up" Wiki

10:07:50 From Barry Kort to Everyone:
	"InSight" stands for "Interior Exploration using Seismic Investigations, Geodesy, and Heat Transport."
10:11:07 From Steve Isenberg to Everyone:
	When he says that it reaches Mach 1, is that relative to Mars speed of sound?
10:13:46 From Barry Kort to Everyone:
	«The speed of sound on Mars is significantly lower than on Earth. On average, the speed of sound on Mars is around 240 meters per second (about 784 feet per second), compared to about 343 meters per second (around 1125 feet per second) on Earth at sea level.»  [From ChatGPT]
10:15:05 From Barry Kort to Everyone:
	I’m guessing that you don’t want the rotors to break the sound barrier, as that would waste energy.
10:20:27 From Judy & Mike Alexander to Everyone:
	The tips of some of the earthbound helicopters' blades evidently do exceed Mach 1.  In those cases, the helicopter sounds like it's generating a rapid series of explosions -- very annoying.
10:21:25 From Bob Primak to Everyone:
	I don't think the Martians will mind, much. : )
10:22:04 From Barry Kort to Everyone:
	i suppose on earth, we can afford to waste energy by emitting sonic booms. But on Mars that would not be a sensible use of limited power.
10:23:09 From Bob Primak to Everyone:
	Maybe the very low density of the Martian atmosphere might cause much less of an issue.
10:24:38 From Larry W to Everyone:
	The US doesn't use counter rotating blades because they're too loud. but Russia does have some.  They are however more efficient.
10:28:49 From Barry Kort to Everyone:
	You don’t need the tail rotor with a pair of counter-rotating lift blades.
10:37:20 From Carl Lazarus to Everyone:
	How do we know the size of Mercury's core without any seismic measurements?
10:43:02 From Barry Kort to Everyone:
	I think it’s based on measurements of the strength of Mercury’s magnetic field.
11:00:04 From Larry W to Everyone:
	The Chinook helicopter which has two sets of rotors on the opposite ends of of the aircraft do rotate in opposite direction also not requiring a "tail rotor". This seems to be much more efficient. I wonder why there aren't more such designs. Also I assume the  Osprey blades rotae in opposite directions.
11:04:48 From Chuck Kaufman to Everyone:
	are the Webb photos real color?
11:05:51 From Judy & Mike Alexander to Everyone:
	No.  Webb detects infrared radiation.  So the colors must have been added by NASA to make things clearer.
11:16:26 From Carl Lazarus to Everyone:
	I hope Boeing installs all the bolts.
11:25:53 From Judy & Mike Alexander to Everyone:
	"A billion here and a billion there.  Pretty soon it becomes real money."
11:30:29 From Barry Kort to Everyone:
	It really sucks to have an open gash in the side of the passenger compartment.

10:08:12 From Steve Isenberg to Everyone:
	Do you take into account difference in speed of light through air and water (non-cloud moisture in air)?
10:17:14 From Steve Isenberg to Everyone:
	Can the mapping collect real time events, such as seeing people walking or vehicles as they move?
10:18:54 From Steve Isenberg to Everyone:
	What is the price range of the cameras BAE sells?
10:22:23 From Steve Isenberg to Everyone:
	As plane is moving as it’s doing the mapping, and sending laser beans to a given spot on the ground, can the laser angles see under objects?
10:24:02 From Steve Isenberg to Everyone:
	(You just answered the angles question!)
10:27:41 From John Rudy to Everyone:
	can you in any way measure what is under the ground?  like bombs or tunnels
10:30:05 From Larry Wittig to Everyone:
	Can you damage the eyes of observers on the ground?
10:30:09 From Judy & Mike Alexander to Everyone:
	Please comment on eye safety on the ground (where/what you're measuring)
10:32:21 From Dick to Everyone:
	How do you get the "tilt" data? What does it tell you?
10:38:07 From Dick to Everyone:
	What wavelengths do you use?
10:39:57 From Steve Isenberg to Everyone:
	Do you use different laser wavelengths for different conditions?
10:40:32 From Steve Isenberg to Everyone:
	Or maybe do you use multiple wavelengths at the same time (would this improve mapping)?
11:00:35 From Steve Isenberg to Everyone:
	Is the laser/lasers you use be weaponized?  (Ie, see bad guy running through forest and disable him/her)
11:05:46 From John Rudy to Everyone:
	could you find lost hikers in the mountains
11:07:28 From John Rudy to Everyone:
	but they are moving
11:07:51 From Steve Isenberg to Everyone:
	Can the heat of an object be measured, so that maybe a lost hiker on a colder ground could be detected using their body heat

10:31:24	Barry Kort:	WiFi speeds vary.  2.4 GHz WiFi is slower than 5 GHz WiFi, and both are typically slower than hard-wired Ethernet.
10:32:34	Bob Primak:	From th AX standard onward, MIMO uses multiple channels simultaneaously to increase network throughput. WiFi-6 is even faster.
10:34:30	Barry Kort:	Synology makes a nice local network storage device for your LAN.
10:54:12	Bob Primak:	Actually, nearly all fiber-optic ISPs have symmetrical upstream/downstream bandwidth. Verizon is by no means unique in this regard, for businesses.