ordering satellite images

How come it is possible to order satellite images for research purposes even thought satellites dont exist? You can easily say that international connections and gps network can be managed trough gps/radio towers and NASA pics are faked....but when YOU order a satellite image for YOURSELF for research....how come? I recently saw a document on tv about a research team that was trying to locate the source of oil rafts in the atlantic ocean....they ordered satellite images and used them to locate the oil rafts and therefor were able to locate the shipwreck that was leaking all the oil......alot of the pics were taken from such heights that airplane cannot possibly fly there (showing very large areas of the atlantic ocean).

i currenly dont have any of the material from the document in my hands, but ill try to find some...

Stratellites and/or pseudolites.

Stratellites and/or pseudolites.

Not always possible as your can order a picture from anywhere.  Unless you think the winds blow everywhere you want them to blow. 

Not always possible as your can order a picture from anywhere.  Unless you think the winds blow everywhere you want them to blow. 

Ever been to a restaurant?

Quote from: sokarul on September 26, 2007, 05:28:41 PM

Not always possible as your can order a picture from anywhere.  Unless you think the winds blow everywhere you want them to blow. 

Ever been to a restaurant?

Ever stayed on the topic?

Quote from: divito on September 26, 2007, 05:07:43 AM

Stratellites and/or pseudolites.

Not always possible as your can order a picture from anywhere.  Unless you think the winds blow everywhere you want them to blow. 

The wind does blow everywhere.

A static atmosphere would defy the laws of diffusion.

Quote from: sokarul on September 26, 2007, 05:28:41 PM

Quote from: divito on September 26, 2007, 05:07:43 AM

Stratellites and/or pseudolites.

Not always possible as your can order a picture from anywhere.  Unless you think the winds blow everywhere you want them to blow. 

The wind does blow everywhere.

A static atmosphere would defy the laws of diffusion.

Missing the importance of dependent phrases would defy any hope that we'd consider you intelligent.

Ever stayed on the topic?

I am on topic. Ever been to a restaurant?

Quote from: Raist on September 26, 2007, 06:20:42 PM

Quote from: sokarul on September 26, 2007, 05:28:41 PM

Quote from: divito on September 26, 2007, 05:07:43 AM

Stratellites and/or pseudolites.

Not always possible as your can order a picture from anywhere.  Unless you think the winds blow everywhere you want them to blow. 

The wind does blow everywhere.

A static atmosphere would defy the laws of diffusion.

Missing the importance of dependent phrases would defy any hope that we'd consider you intelligent.

Lol so what does it prove when you do it?

Quote from: Gulliver on September 26, 2007, 06:19:31 PM

Ever stayed on the topic?

I am on topic. Ever been to a restaurant?

Explain how order satellite photos in the FE model has anything to do with sokarul's having been in a restaurant?

Explain how order satellite photos in the FE model has anything to do with sokarul's having been in a restaurant?

Fine.

You order a picture (food), they send said stratellite/pseudolite (waiter/waitress) to the area (kitchen), it takes the picture (chef prepares food) and they send it to you (bring your food). A little weak given that the kitchen never changes, but still close enough to make my point. I don't know why people would limit it to what they have in the sky, or that they somehow are unable to control their crafts.

Quote from: Gulliver on September 26, 2007, 06:34:35 PM

Explain how order satellite photos in the FE model has anything to do with sokarul's having been in a restaurant?

Fine.

You order a picture (food), they send said stratellite/pseudolite (waiter/waitress) to the area (kitchen), it takes the picture (chef prepares food) and they send it to you (bring your food). A little weak given that the kitchen never changes, but still close enough to make my point. I don't know why people would limit it to what they have in the sky, or that they somehow are unable to control their crafts.

The point you seem unable to grasp that sokarul explicitly made is that the FE stratellites cannot be be so controlled.

The point you seem unable to grasp that sokarul explicitly made is that the FE stratellites cannot be be so controlled.

Oh, and how does he know this?

Quote from: Gulliver on September 26, 2007, 06:42:47 PM

The point you seem unable to grasp that sokarul explicitly made is that the FE stratellites cannot be be so controlled.

Oh, and how does he know this?

From mankind's study of the atmosphere with such devices as weather balloons.

From mankind's study of the atmosphere with such devices as weather balloons.

Weather balloons have no means of propulsion.

Quote from: Gulliver on September 26, 2007, 06:50:28 PM

From mankind's study of the atmosphere with such devices as weather balloons.

Weather balloons have no means of propulsion.

Correct. But they do measure the wind velocities and their variability.

Correct. But they do measure the wind velocities and their variability.

What does that have to do with stratellites and pseudolites not having the means to get from point A to point B? They are not weather balloons.

Quote from: Gulliver on September 26, 2007, 06:54:15 PM

Correct. But they do measure the wind velocities and their variability.

What does that have to do with stratellites and pseudolites not having the means to get from point A to point B? They are not weather balloons.

Speaking for sokarul, a lot. There is no known means to provide the required propulsion. FE has yet another unanswered challenge.

Speaking for sokarul, a lot. There is no known means to provide the required propulsion. FE has yet another unanswered challenge.

A fan? Or what they use in space, I think they are ion thrusters? I haven't started reading about propulsion, but would these not work?

Quote from: Gulliver on September 26, 2007, 06:59:11 PM

Speaking for sokarul, a lot. There is no known means to provide the required propulsion. FE has yet another unanswered challenge.

A fan? Or what they use in space, I think they are ion thrusters? I haven't started reading about propulsion, but would these not work?

A fan, or more properly a propeller, requires an energy source. Carrying along fuel is a exercise in diminishing returns. Using sunlight fails both in terms of quantity and efficiency for propellers. Now ion technology is interesting but has no relevance here for two reasons. First, they still require a propellant, usually Xeon. Second, they fail to provide significant thrust. They're used in long-term in vacuo spaceflight.

So, no. these would not work.

I shall have to read a bit more.

I shall have to read a bit more.

Most certainly fair enough. The key to understanding the difficulties is two-fold: reaction mass and energy requirements

Quote from: sokarul on September 26, 2007, 05:28:41 PM

Not always possible as your can order a picture from anywhere.  Unless you think the winds blow everywhere you want them to blow. 

Ever been to a restaurant?

I went to Taco Bell, ordered a big mac and they started to laugh at me. 

Quote from: Gulliver on September 26, 2007, 06:54:15 PM

Correct. But they do measure the wind velocities and their variability.

What does that have to do with stratellites and pseudolites not having the means to get from point A to point B? They are not weather balloons.

The balloons will provide the weather conditions and wind velocity information for the stratellites to navigate to the specified area.

You are asking us to tell you the design considerations and choices of devices we've never seen. 

There are several papers in the IEEE database about stratolites and their propulsion. However, if you can read them, you can search for them yourself .