Bolne se pehle kuch toh lihaaz kiya karo. Pakistan ki kuwwat khatre pe pad jaayegi. Unki jamurihat waise bhi nahin hain, aur aap chahte ho ki unki fauz bhi apne aaka (China) ke istaqbal ke kaabil na rahe?????
Hope my urdu is decent enough :biggrin2:
ISRO General News and Updates
- Thread starter rahulrds1
- Start date
Hope my urdu is decent enough :biggrin2:
Kalki_2018
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GSAT-11 is 5.7 tonnes. We will need to wait for the semi cryo engine for GSLV-III to launch it. I am hoping ISRO is already on it. With L110 they can manage 4-4.4 tonnes perhaps.
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We can always launch 2 satellites instead of one by splitting the payload. That will ensure full indigenous solutions till heavier GSLV is made
Kalki_2018
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Yeah once they get to a stage where they can do 12-18 launches a year.
cyclops
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Production of NavIC Messaging Receiver
Introduction
NavIC Satellite Constellation have a wide coverage area up to 1500 km around the Indian main
land. They are mainly designed for Regional Navigation Services. In addition to their primary
functionality, they allow broadcasting of additional short messages. These messages can be
related to alerts, forecast and directives on the occurrence of natural disasters like Floods,
Earthquake, Tsunami, Cyclones, Landslides etc. and dangers for the safety of life in areas with
poor or no communication infrastructure. The NavIC Messaging Receiver is conceptualized and
developed at Space Applications Centre (SAC), ISRO, Ahmedabad for reception and display of
these messages. The receiver transmits raw data over Bluetooth link. An application running on
a smart device like mobile phone or tablet having Bluetooth connectivity can decode and display
the messages for users. This receiver is designed as battery operated low power device. This note
describes hardware architecture and requirement for product.
1. Objective
SAC has developed working prototype hardware. Product can also be used by fishermen/ marine
applications in deep sea. IP67 packaging is to be designed by vendor along with battery charging
option. Vendor participation is invited for production of same hardware in large numbers.
2. Design
NavIC Messaging receiver has been designed to provide positioning along with messaging. NavIC
module can be procured from ANTRIX Corporation Limited, Bengaluru, a commercial arm of ISRO.
In addition to the NavIC chipset, it uses ATMega328P microcontroller and HC-05 Bluetooth(BT)
module. The controller provides configuration for chipset and BT module. Microcontroller acts as
an interface between chipset and BT. The TPS73633DBVT LDO converts 5V to 3.3V. It is designed
to draw power from battery or power bank. The power consumption of the receiver is around
100 mA @ 5V. The receiver can work for about 4 days using a 10000mAh power bank. The block
diagram of NavIC messaging and positioning receiver is as shown in Figure-1. Currently all the
data from NavIC receiver is passed over BT to mobile which is consuming more power in both
receiver and mobile. The blocks in dotted section are getting implemented as future
enhancement. The idea is to save power in both mobile and device. This will be achieved by
filtering out the messages in microcontroller and pass only needed messages to the mobile
application. Figure 2 shows actual photograph of NavIC messaging receiver. The current size of
PCB is 41mm x 46mm. The size of PCB with enhance feature is 70mm x 50mm.
Above figure shows set up of receiver which has external antenna and it is drawing power from
power bank. The Receiver has been developed, tested, demonstrated and delivered to many
users. An Android application is also developed to display the messages on Mobile phone / tablet.
Messages broadcasted by INCOIS can be received using this application.
3. Vendor Responsibility
Interested vendor has to fabricate the receiver PCB and design packaging including all the three
components. The package has to be IP 67 compliant. The option of using power bank or some
rechargeable battery is left to vendor.
4. Mode of Technology Transfer
SAC-ISRO has developed hardware and firmware for intended application.
SAC / ISRO will provide technical details to Indian industry on a request basis
against Non-disclosure agreement as per ISRO guidelines for this technology.
Mikesingh
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He's my neighbor. Shooting for his space adventure movie starring Aamir Khan was supposed to have been launched last June, but some problems cropped up and it's been put on hold. Let's hope the shooting re-commences soon.
lcafanboy
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GSAT-11 could be last Indian satellite to be launched by a foreign rocketSunday, January 28, 2018
If things pan out as intended, the 5.7-tonne GSAT-11 will be most probably the last heavy Indian satellite to be launched by a foreign space agency, according to K. Sivan, Chairman of the Indian Space Research Organisation (ISRO).
The GSAT-11 communication satellite will be launched by Arianespace's Ariane rocket soon.
"We are working on a dual concept: Increasing the carrying capacity of our heaviest rocket -- the 640-tonne Geosynchronous Satellite Launch Vehicle-Mk III (GSLV Mk III) to six tonnes -- while producing high throughput and lower weight communication satellites," said Sivan.
He said nearly 60 per cent of the satellite weight consists of onboard chemical fuel and by opting for electric power for manoeuvring in space the mass of the satellite will be reduced.
The Indian space agency had tried electric propulsion in its GSAT 9 satellite.
At present, the GSLV Mk III rocket has a carrying capacity of four tonnes. The Indian space agency is working on increasing GSLV Mk III's carrying capacity to six tonnes.
"Now most of the satellites will be contained to four-six tonnes," Sivan said.
According to Sivan, the capacity enhancement is not restricted to GSLV Mk III alone but also to other rockets as it would bring down the overall launch cost.
But that doesn't mean ISRO would freeze development of higher payload rockets.
"We have the capability to design and build over six-tonne payload rockets. We will start designing for bigger rockets," Sivan remarked.
"Our major objectives are to increase the production of rockets so as to increase the number of satellite launches; enhance our rocket's capability; look at reduction of rocket production cost; develop and realise the small rocket with a carrying capacity of 500 kg and also realise reusable launch vehicle/rocket," Sivan remarked.
According to him, to increase the production of rockets, the space agency is looking at transferring the technology for making Polar Satellite Launch Vehicle (PSLV) rocket to industries.
"We are working out the methodologies like joint venture for that purpose," Sivan said.
That apart, ISRO is also open for transferring the technologies developed by it to the private sector for commercialisation and wider use.
"For instance, we will be transferring the technology for making lithium ion battery that could be used to power automobiles," Sivan added.
Sivan said ISRO is also focusing on developing a reusable launch vehicle that involves a lot of new technologies and the Scramjet engine which in turn would reduce costs.
According to him, the first half of 2018 will be busy with the launch of Chandrayaan II (moon mission), GSAT 6A and a navigation satellite as the replacement for the first of the seven navigation satellites.
On January 12, ISRO launched its remote sensing satellite Cartosat.
Sixty-year-old Sivan, the new head of the Indian space agency, is not shy of saying that he wore trousers and chappals for the first time when he stepped into the Madras Institute of Technology (MIT) here for a degree in aeronautical engineering.
"I studied in Tamil medium in a government-owned school. I wore only dhoti and shirt without any footwear till I finished my graduation at the ST Hindu College in Nagercoil. Only after joining MIT did I start wearing trousers and chappals," Sivan told IANS.
Son of a farmer, Sivan used to help his father in farming and also in his vegetables/fruits trading activity during his school days. Today, as the head of one of the world's premier space agencies, Sivan's task is cut out.
Sivan's elder son has completed electronics and communication engineering and the younger son is pursuing a graduate degree in animation while his wife is a homemaker.
Queried about his management style Sivan said: "I delegate work and expect deliverables as promised. Space system is unforgiving. If there is a problem, it will fail."
https://economictimes.indiatimes.co...-by-a-foreign-rocket/articleshow/62591762.cms
ISRO has developed all Electric propulsion for Satellites which will reduce weight of satellites by 50% as fuel carried by satellites constitutes 60% by weight of any satellite. With electric propulsion the need for carrying this fuel is eliminated and reduces the weight of satellite. So keeping the same capacity or even more the next GSAT will weigh around 3-3..5 tons only well within the launch capacity of GSLV mk3...................
That finishes our dependency on ARIANE. Bye-bye ARIANE................
@sayareakd ............. hope you are not getting any idea :biggrin2:
NeXoft007
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nongaddarliberal
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Arihant Roy
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Wasn't the earlier plan was to have the first launch towards the end of this year. During periods of increased tensions or skirmish with Pakistan and China this SSLV will be used to launch a series of expendable IMINT satellites to cater to the increased demands of upto date imagery of hostile formations and installations.
porky_kicker
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A TEL mounted SSLV if possible , would help the military in times of conflict replace attrition losses or launch specialised nano/micro satellites in support of ongoing conflict as per requirements.
I believe India should persue it.
Arihant Roy
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R-36M is a meter fatter and is liquid fuelled. It is more closer to Topol-M aka RT-2PM-2 which has a 1.9 m dia and is a three staged solid fuelled missile. But the SS-27 weighs around 47 tons,less than half of our SSLV.2m diameter and 34 m long, almost the exact dimensions of SS 18 Satan b
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I am more interested to know how many launches SSLV will see per year? If its 3 days to assemble, we can offer an endless launch capacity provided we have enough customers. Indian universities whould start sending satellites and doing some science. And we need more space-startups in the country.
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NeXoft007
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That's because SS-27 is dwarfer and slimmer than SSLV. Anyways, I was too thinking of a dedicated TEL for it.
