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docel
07-12-2010, 07:20 PM
ISRO has successfully launched PSLV-C15 (http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Jul12_2010) to day.

Congratulations ISRO (http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Jul12_2010) !!

The most important and inspiring Payload was the Student designed STUDSAT (http://www.isro.org/satellites/studsat.aspx) , which has been successfully put into its 630km orbit.

Congratulations to the STUDSAT designers (http://www.teamstudsat.com/) !!

The other interesting Payload of the PSLV-C15 is also a Student designed affair - NLS-6 (http://www.utias-sfl.net/NLS-6/) by the University of Toronto UTIAS-SFL (http://www.utias-sfl.net/) .

This should be an inspiration to all students - YOU CAN DO IT, TOO !!

More... (http://www.roboticsindia.com/content.php/135-STUDSAT-Student-designed-Satellite-in-Orbit-21)

asimov_18
07-12-2010, 09:55 PM
HI,
Indeed its a commendable achivement


Asimov

Blacksteel
07-13-2010, 11:58 AM
Wow.. now THAT's something..
thanks for the info.

vikas
07-13-2010, 02:32 PM
Congrats to the team ... really cool !!! worth praising ...

robodam
07-13-2010, 06:21 PM
are these students from india?

Blacksteel
07-13-2010, 08:01 PM
Yes. Apparently from Karnataka and AP. Follow http://www.isro.org/satellites/studsat.aspx to read more.

lolman_returns
07-13-2010, 08:31 PM
Woot! Good Job! I just sent them a congratulatory email :) I am one up.

karthikgandiban
07-14-2010, 11:37 AM
Thankyou all for your support.................... Proud to be a CORE member of the team.

akshay66
07-14-2010, 06:47 PM
:) great work guys..!!!!

karthikgandiban
07-14-2010, 07:06 PM
Now we can proudly say " Our heads are held high, not looking at the sky, but Beyond"..................:)

lolman_returns
07-14-2010, 07:22 PM
Hi Karthik

Please let us know when you receive the pictures from your satellite :) Would love to see them !!

karthikgandiban
07-14-2010, 07:50 PM
sure, today we have initiated the mission mode................

docel
07-18-2010, 05:36 PM
The sad part is : most of the students are totally unaware of this achievement, including students from the same college colleges!!!

karthikgandiban : It will be nice if you can post some Pics and Vids of the mission ( with relevant permissions, ofcourse ).

Congratulations , once again to you & your Team !

Check this out too - http://www.roboticsindia.com/content.php/135-STUDSAT-Student-designed-Satellite-in-Orbit-21

shobhitkukreti
07-18-2010, 05:41 PM
I totally agree with docel. My own sister, pursuing her B.tech had no information on this.

docel
07-18-2010, 05:44 PM
Yes Shobhit - i was surprised that students from the same colleges had no idea about this at all. That is why i posted that News here.

I made this an Article too with a little more info - Hope everyone reads it -
http://www.roboticsindia.com/content.php/135-STUDSAT-Student-designed-Satellite-in-Orbit-21

shobhitkukreti
07-18-2010, 06:35 PM
I do not have access to the article. It says :
" 1. Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
2. If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation. "

rao
07-18-2010, 06:37 PM
Doc forgot to publish it :) Try now., its on the front page.

shobhitkukreti
07-18-2010, 06:39 PM
Thank You Rao

docel
07-19-2010, 10:08 AM
Thanks Rao,

More Satellites are being designed by Indian Students. Some of them are :

1. ANUSAT (http://en.wikipedia.org/wiki/ANUSAT) by Anna Uni. Students Chennai
2. JUGNU (http://en.wikipedia.org/wiki/Jugnu_Satellite) by the students of IITK Kanpur
3. PRATHAM (http://www.aero.iitb.ac.in/pratham/) by IITB Mumbai
4. VITSAT by VIT Uni. Vellore ( sorry...couldn't find any reasonable or meaningful link )

A lot of student satellites are currently in Orbit and many are getting ready for their launch.

There are several student Space exploration societies like SEDS (http://seds.org/), with an active branch in India (http://india.seds.org/) too. Several colleges have a Space society / Group / Club like SPATS (http://spats.in/).

karthikgandiban
07-19-2010, 04:18 PM
Have u seen STUDSAT pics????????

docel
07-19-2010, 06:17 PM
Have u seen STUDSAT pics????????

Yes. I have.....but don't want to post any links to them as most of the sites hosting them are a little 'funny'.
So , why aren't you posting them yourself? You must be having a bunch of them for public viewing.

Also, can you post the Studsat Keplerian elements ? I got it as : 1 36801U 10035G 10196.78582254 .00000698 00000-0 10000-3 0 140
2 36801 098.1468 255.9808 0013548 276.1619 083.8047 14.79744784 540
It will help me to track it from home.

karthikgandiban
07-20-2010, 07:19 PM
Studsat
1 36801u 10035g 10201.11350588 .00000698 00000-0 10000-3 0 271
2 36801 98.1462 260.3669 0013659 261.9491 98.0105 14.79749808 1188

docel
07-20-2010, 08:14 PM
Thanks Karthik !
I got the Keps from NASA and am tracking the Sat since Orbit 64. I'm yet to receive the signals though, maybe not till I set up another 9el Yagi. I almost received the beacon but there was a lot of Packet Troposcatter from somewhere and couldn't resolve. I will post when I get a S9 copy of your Satellite !!

karthikgandiban
07-21-2010, 12:54 PM
Hi,
Thanks a lot for tracking our satellite,
I would like to know the exact frequency at which you are receiving Beacon.....
the beacon frequency is 437.861MHz............
And the packet data is at 437.506MHz....

lolman_returns
07-21-2010, 01:42 PM
Wow, looking at all that space jargon, I know I have to google a lot tonight.

shashak
07-21-2010, 03:37 PM
Hey doc can you please give a brief about your setup to track Studsat. I have no rampup knowledge about it.
@ karthik , great work man !

karthikgandiban
07-21-2010, 07:04 PM
@docel : Hi do you know any one who can help us tracking abroad?

karthikgandiban
07-21-2010, 09:08 PM
Thanks........

docel
07-24-2010, 03:36 PM
@shashak :
I use an FT-100D Tranceiver and a self-made twin-boom steerable motorised 2x 9el 70cm Quagi Antennas. I also have a multi-band Discone antenna for receive only.
Another set-up is an FT-290R/MkII based Transverter for the 70Cm. band ( 430MHz). The receive converter is homebrewed and is fed by the same above antennae through a 17db LNAA435-XX Low Noise Amplifier (LNA). Sorry , but will post some details some other time when I'm free.

Making a satellite or receiving a Satellite signal isn't too difficult, if you have the inclination & money. Cubesats are DIY of-the-shelf affairs and are available on-line, just like the hordes of LFRs and Quadbots, if you have a good Credit-card. These things aren't 'made' by anyone sane nowadays.

Most Student Satellites are unnecessarily hush-hush jobs with no details or open shared information. This is very unfortunate indeed !

@karthikgandiban :
I have asked some students of mine to track from Europe and Bolivia. Lets wait and see.

yaniv
07-25-2010, 06:33 PM
These things aren't 'made' by anyone sane nowadays.


@ docel,
What do you mean by that??

docel
07-25-2010, 07:13 PM
Well... people who 'make' things are called 'geeks (http://www.geekcode.com/geek.html)' aren't they?? :rolleyes:

Geek (http://www.urbandictionary.com/define.php?term=geek) is a derogatory slang used to describe people who are weird and abnormal - geeks (http://www.thinkgeek.com/about-us/) go about wasting time making strange things, instead of buying it of-the-shelf, so that they can spend the same time studying hard to score >98% !!

(Sorry- but this is exactly what someone said to me 2 days ago, when his son got interested in Satellite building, after reading this thread :( )

karthikgandiban
07-25-2010, 07:28 PM
For your kind information our satellite is not off the shelf, right from the PCB to Structure every thing was designed and developed in house by us. we have even applied for Patent. except the power board which was procured.................

karthikgandiban
07-25-2010, 07:29 PM
Thanks for the info on Tracking......

docel
08-12-2010, 01:24 AM
I don't see ANY more info regarding the STUDSAT anywhere. Somehow people ignore their responsibilities after something is done. The job is not complete after a launch and a few press briefs.

Sad, but why do our guys leave everything blank afterward .....

lolman_returns
08-12-2010, 03:02 AM
Just a thought, but does the giant solar flare EMF wave that hit earth this tuesday, in anyways, affect the studsat?

docel
08-14-2010, 12:27 AM
Just a thought, but does the giant solar flare EMF wave that hit earth this tuesday, in anyways, affect the studsat?

I sure can!!

If you're worried by the Tuesday flare, wait till the 2012, the 11 year Solar peak, flares 'bomb' the earth !!!! :)

Studsat ( and other Picosats of its type ) have a bare minimum skin and EMI shielding- principally due to the stringent requirements of size. A 10cm cube surface area can intercept a substantial amount of EMR and develop sparks enough to trash the internal Electronics. It all depends on where the Satellite is at the time of strike. But , not many big satellites are affected simply because they have better skin shielding meant to keep off strong EMR strikes and prevent HT emfs entering the interior electronics.
The Proton 'bomb' can penetrate into the satellite shell material and induce electron sprays that flow over all the Electronic components . The induced currents are strong enough to 'arc' and physically damage components and PCB tracks. They can even flip memory locations from 0 to 1 and vice versa- actually re program the ROM/RAM.
The most vulnerable is the Solar panel. Anything that is Silicon will degrade drastically due to induced high voltage / high currents that damage by 'short circuit' or 'arcing'. In fact, a Satellites life-time is governed by the number of Solar flare CME bombings that it takes. The Solar cell degrades and the usefull life is reduced, in spite of the satellites installed with 25% more surface area of the solar panels for this very same reason. The Solar cells are the most monitored things and its life time is indicated by the telemetry signals received constantly by the Earth station.

A Solar flare will produce EM radiations from X-rays to Protons. These radiations can run up to several days from its origin. X-rays and Protons are the major constituents - strong enough to disrupt electrical grids on the Earth itself, as happened several times in the past. The major safety device for the reduced damage on earth is the Ionosphere- Magnetosphere combine that act like Faraday shields and deflect these massive EM radiations. This may not be possible with small Pico size satellites as they have absolutely NO EMR shields other than the Solar panel and underlying thin structural aluminium. Imagine- a spark may contain several 1000s of amperes of current at very high Potentials. Last years big flare of February was described as "60,000-mile-high wave of super-hot plasma and magnetism blazing across the sun’s surface at 560,000 mph ". This massive force can physically 'push' a samll satellite into the Earths atmosphere.

Low Earth Orbit satellites undergo Orbital decay due to the Earths atmospheric drag. The satellites are slowly losing their altitude and are attracted towards the Earth. At some point, they re-enter the atmosphere and vaporize. A Solar Storm heats the upper atmosphere. This temperature increases drag and the Orbit decay of the satellite will increase, bringing it closer to the Earths atmosphere hence reducing its time in Space.

A lot of satellites are damaged by these solar storms resulting in premature death. This also increases the chance of collision with all the man-made junk orbiting around there too.
Life is'nt all quiet and peaceful up there in Space !!

lolman_returns
08-14-2010, 12:50 AM
Thanks Doc,

That was depressing and informative at the same time :P
This thread is increasing my glossary by tenfolds !!

abhinavaeromodeling
12-02-2010, 03:26 PM
the achivement is an outcome of ones mind performance i say good luck to all studsat disigners