Should Pakistan look into High flying planes instead of satellites

[Devil Soul]

big foot, ur post have been reported.... ur a retard

 

[jagjitnatt]

The weight would be from the lens itself..
The CMOS(or else) sensor..the DSP..the governing GPP.. all can be fit into the size of an iphone.. back a few pounds of Li cells.. and you are ok for ten hours of continuous video without charge..or three days of HD pictures..
THe world is a lot different now...

However..in it cannot replace a satellite for a very good reason..
something called a surface to air missile.. unless you design it to be a LO platform..and then the weight truly kicks in.

Alright, as you say, but only if you are ready to accept the iphone quality pictures, and a max resolution of 25-100 sq km.

A 10 km x 10 km field would look like a pixel on that cam, I wonder how good would that be for ur army.

For a resolution of 10 m x 10 m you need a camera weighing at least 800-1400 kilos with mechanical steering to move the lens, and a transmission system capable of transmitting data at a few MBps, and power enough to transmit those using microwaves. and computers powerful enough to correct the microwave beam angle at every few milliseconds because the plane is moving all the time.

I guess that is simply not possible on a small plane like this.

 

[nescafe]

The weight would be from the lens itself..
The CMOS(or else) sensor..the DSP..the governing GPP.. all can be fit into the size of an iphone.. back a few pounds of Li cells.. and you are ok for ten hours of continuous video without charge..or three days of HD pictures..
THe world is a lot different now...

However..in it cannot replace a satellite for a very good reason..
something called a surface to air missile.. unless you design it to be a LO platform..and then the weight truly kicks in.

awww come on man....the trassnsmitter antenna size increasse for the military bandwith!!

if the gsm phone is 10 kilometer away from the serving BTS then the battery will run out very quickly

also,the gsm MS carries one channel which has the max transmission of 13.4kbps (x 2 for half rate).what if it has to carry two for higher data rate to match satellites.

imagine a cell with both wimax and gsm tranceiver and the cellphone is 5 km away from the serving site... it will literally drain in minutes...i dont think the so called miniature power system can deliver much amperes at all...

not to mention cloud ceiling here... which altitude are you guys talking about 30 km??

 

[Safriz]

I doubt mildly bad weather at 70 000 feet

For all those who say bad weather will effect this...There is no weather above "Tropopause"

This plane or anything like this will fly in Stratosphere and above where there is no clouds and no weather except jetstreams which can be predicted and kept away from..

 

[Safriz]

About weight .. something like this can lift more than 600 tons and stay afloat at high altitude unmanned and for extended periods of time..Spain has been using a similar craft for suveilance and classified reasons for many years now.
[video=metacafe;2102429/zeppelin_aircraft_lockheed_martin_p_791/]http://www.metacafe.com/watch/2102429/zeppelin_aircraft_lockheed_martin_p_791/[/video]

Here are some more articles about Modern day zepplins

http://defensetech.org/2004/01/26/zeppelins-return/

 

[Haseebullah]

For all those who say bad weather will effect this...There is no weather above "Tropopause"

This plane or anything like this will fly in Stratosphere and above where there is no clouds and no weather except jetstreams which can be predicted and kept away from..

Thats exactly what i meant.

 

[PurpleButcher]

i have been working on solar systems for three years and this idea does not seem feasible since the plane cannot fly on solar power alone for weeks because of night time and also if you go for battery storage than the weight requirement will be too much. also if the weight increases than so will the power requirement and thus more solar panels will be required.

A hot air baloon seems a much feasible solution

 

[Safriz]

i have been working on solar systems for three years and this idea does not seem feasible since the plane cannot fly on solar power alone for weeks because of night time and also if you go for battery storage than the weight requirement will be too much. also if the weight increases than so will the power requirement and thus more solar panels will be required.

A hot air baloon seems a much feasible solution

Hi,
The plane is made of Carbon fiber which is lite and strong and the solar panels are wafer thin..plus lithium batteries which can be charged during day and used during night..so 24 hour operation.

Its not a hot air balloon..Its a Helium balloon...

 

[IND151]

Pakistan should have both satellites and high flying planes. us had( and has ) hundreds of satellites. even then they deployed sr 71 and blackbirds gave them lot help.

 

[Safriz]

Pakistan should have both satellites and high flying planes. us had( and has ) hundreds of satellites. even then they deployed sr 71 and blackbirds gave them lot help.

In those days there were no high resolution cameras,and satellites couldnt send clear pictures of Ground targets useful enough for military intelligence..For that reason U2,SR-71 and other such planes were used..But when the satellites had High resolution cameras,the Planes were decommissioned.
But now a days High resolution cameras are light,compact and cheap and can be mounted on these low cost planes and used cost effectively for intelligence and surveillance...
Specially for a country like pakistan who doesnt have rockets and gound stations to launcha nd track satellites,it may be more feasible to use high flying solar planes or helium hybrid Blimps.

 

[Avatar]

Hi,
The plane is made of Carbon fiber which is lite and strong and the solar panels are wafer thin..plus lithium batteries which can be charged during day and used during night..so 24 hour operation.

Its not a hot air balloon..Its a Helium balloon...

It sounds like a wonderful plan but it's not feasible in the real world.
Solar UAV's are nowhere close to conventional powered UAV's when it comes to reliability. They are very weak structurally due to weight constraints. With the amount of equipment required for actual surveillance the plane would be too heavy to take off (let alone reach 70,000 feet) It simply cannot be compared with satellites .

This is what a carbon fiber solar UAV (that can fly at 100,000 feet) looks like after a little turbulence.

 

[IamINDIA]

the US still uses U-2 spyplanes,so there must be something usefull about them....

 

[Chogy]

the US still uses U-2 spyplanes,so there must be something usefull about them....

They are probably used more these days for research than spying. But manned aircraft can provide real-time coverage, whereas satellites cannot remain on-station.

The manned AC mission is still there, just not as much as it used to be.

 

[Safriz]

They are probably used more these days for research than spying. But manned aircraft can provide real-time coverage, whereas satellites cannot remain on-station.

The manned AC mission is still there, just not as much as it used to be.

Between consecutive satellite passes over a certain area you are blind..while these high flying planes can be steered to any location when needed..This option is not available with satellites.

 

[malikkhawar]

Pakistan should have both satellites and high flying planes.