January 16, 2007
-
Satellite
This is the coolest thing ever:
NASA J-Track 3D (You’ll need to allow popups and Java)
It tracks all the satellites currently orbiting the earth. This month’s Scientific American offered a quick introduction to the satellite system that powers XM, Sirius and WorldSpace. From there a quick search on Wikipedia revealed this article about geosynchronous satellites, as well as the above link to NASA.
I am just fascinated by this Java app; its amazing to see the Wikipedia article come to life visually. For example, the haze of satellites really close to the earth are the ones orbiting in Low Earth Orbit. If you zoom out a bit you’ll see a band of satellites, kinda like a ring of Saturn; these are the geostationary satellites. The Wikipedia article also mentions inclined orbits, where a satellite will seem to oscillate around a fixed point in the sky. By enabling orbital paths in the Java app (View -> Orbital Paths), you can see that the satellites just off the center of that ring do indeed oscillate across a fixed point on the earth’s surface!
Navigating to the Satellite -> Select menu will let you pick and choose any satellite on there. Everyday names like GPS, Hubble (abbreviated HST), DirectTV, and Sirius are on there. I’ve literally lost hours playing around with this thing!
Comments (22)
Yep, J-Track rocks. It’s been around in one form or another for as long as I can remember (in internet time, anyway).
I know it’s probably tough to do this in NYC, but have you ever seen a satellite whiz by at night? It’s pretty cool
interesting, there’s even the malaysian measat1 and 2 there
woah, that’s pretty rad
Wow… that is pretty awesome… man… I love it when technology is used for cool stuff like that…
I have to eat sometime, and go to class, so I’m just going to say that this is awesome. Really, really awesome.
Dr. Carasco
hi monsur!!! =)
Nice find for us science nerds.
that is a cool applet. Thanks for sharing it.
hmm, there’s a restaurant in brooklyn near my apartment with the name calexico, just like the band listed as your most recently played (Calexico – cruel). are they good?
LV has an excellent reputation among female consumers for its durable quality and exquisite craft. With these good merits,
louis vuitton uk
are really the first choice as a special Christmas gift for yourself and your friends.These is the first time your visit our louis vuit
louis vuitton online shop,welcome.buylouis vuitton onlineCommercial tour (Syria) to sell and buy from syria.
This coach outlet store are compatible with people today. And you will undoubtedly pick out the
coach outlet store online
you desire from all kinds of colors and styles.Appearance fashion, confidence and a perfect coach handbags, you must spend some time and effort to find a division has total choose what you like to for export various kinds of
coach outlet store.I heard ofcoach outlet onlinethrough the advertisement when I was shopping. And now I often brow the webpage and buy Coach bags online.
any
louis vuitton outlet
New backpack features usa a function grownup overall look. Varied piece allows that it is captivated me within the approve and also further than your body.Its
louis vuitton bags outletstore, there a louis vuitton outlet overall look doesn’t endure simply for precisely the little brown eyes that appear in internet, but in addition remain it really is quality that will possibly chafes may be kept and reduce for ages involving made use of.Ergo, if you want to be the best continually louis vuitton outlet online after that have the very best case on hand often. Choose having a type style of fashion as well as leaving the visible difference it can surely make.Along with the ideal workmanship as well as exact diagram marks,louis vuitton handbags outlet.
Are you still worrying about where to buy yourself a Coach? Then
coach bags
Online offering top-quality goods and first-class service can be your way-out.Where there are women, there are bags. Where there are bags, there are
coach outlet store online. Coach products are the direction indicator of the latest fashion and trend.the shirt ofcoach outlet storehas the abbreviation’FHS’, which implies that the school at which he coached has a name that starts with an ‘F’.
This brown handbag called Flagship Signature Brown Handbag has been the best seller in the
coach factory outlet
for almost three weeks.All people give the good comments for the
coach factory online, and now the Coach outlet store provides many discount goods online.There’s the recentcoach factory outlet onlineintended for 2011 of our own Louis vuitton outlet store shopping. Most of these bags possess the top quality & lowest cost!
People need a complete range of bags from the
louis vuitton sale
to suit different occasions, formal or casual. Of course, we need at least one patent leather bag in decent color for formal occasion to match our profession.Looking for a
louis vuitton outletand don’t know where they are? The easiest way is to enter here. That simple and you definitely will never be disappointed.I am so confused that I don,t even know where to buy thelouis vuittonHandbags. Because I can prefer to chose the fashionable design, favorable price, top service .
I got the information of
coach outlet online
from my close friends. They often buy bags, purses and other accessories from this outlet.Performed your
coach outlet store, asked to choose solutions you want, encouraged explain in words it for your close friends.Attention!coach outletis offering new products at favorable prices for August. Brighter colors, finer looks and newer designs, all bring you a whole new summer.
If you want to buy quality Coach products at lower prices, visiting
coach outlet
online can be your best decision.Yesterday, I saw an advertisement of lady’s handbags on Coach Outlets Online. I was obsessed by the unique decorative pattern and special appearance of
coach outlet store online.We have large quantitycoach outlet onlineStore .Welcome to buy, free shipping with great discount promotion and best service for you now.
With the great diversity of styles, patterns and sizes available nowadays, finding the right pieces to highlight your personality is quite important. coach outlet offers exactly what you want.This coach outlet store are compatible with people today. And you will undoubtedly pick out the coach outlet store online you desire from all kinds of colors and styles.coach outlet online is surprisingly patient with Ellis’naive ways and defends him whenever Nick is negative or sarcastic toward him. Both are also native Georgians, which could contribute to their friendliness with each other.
Louis Vuitton is one of the world’s leading international fashion houses.The catching styles and upmarket qualities endeared louis vuitton uk to almost everyone.in fact, louis vuitton is one of the most famous fashion design master.he opened the fist suitcase shop called after his name.louis vuitton outlet is really so well-liked and also treasured during the human beings to be a number of high-end, they may realize that the bring up to date might impact their very own laurels signature in the fashion world as well as talk about in your predisposition in their enthusiasts.
The coach outlet online sales all kinds of Coach bags, purses, sunglasses, etc. Whatever you choose, this Coach store will not let you down.If you desire to go to coach factory outlet, but have no idea in which to go, you can research online. It is no doubt that there is drastically information and details about it for the reference.With the safe door to door shipping, the coach outlet will send the products to your hands, which are of top quality and at competitive factory prices.
Though handbags are basically an accessory item of girls, there are many modern handbags and wallets for males too as it has become the ultimate fashion accessory at coach factory outlet.If you want to have the latest Coach arrivals, coach factory online may be a good choice. It provides its members with actually beneficial?prices?and high quality services.coach factory outlet online is one of the four playable survivors in Left 4 Dead 2. He was a high school health teacher and coordinator for the freshman football team before the Infection hit his hometown of Savannah.
Anyone attempting to enhance their present choice of instructorCoach Saleshould really think
very carefully and do some investigation forward of jumping as well quickly
inside the first affordable artist carrier they find out for the marketplace
place on the net or using a no-standard store providing area inside the Coach Cheapworld. As
getting a collector of bags in instructor Factory, make specific you find out
which you even although you canCheap coachsome run and
persistance, coach
outleta considerable priced oversight which you will not desire to
repeat.