ISRO General News and Updates

[Chinmoy]

Ok, you asked for it. Now tell me the difference b/w a regular telescope (Ladakh) & radio telescope.

Well the difference is simple. As the name suggest, Radio Telescope is not like a normal Optical telescope which is much larger version of binoculars or spy glass.
Radio telescopes does use radio waves to sketch up images whereas the optical telescope (like the one in plan at Ladakh) uses visual images instead.
Optical telescopes does comprise of a large glass to collect light from source, whereas Radio telescope does have a large antenna or an array of antennas to collect reflected radio waves. In other words Radio telescopes are large RADAR.

 

[Kshatriya87]

Well the difference is simple. As the name suggest, Radio Telescope is not like a normal Optical telescope which is much larger version of binoculars or spy glass.
Radio telescopes does use radio waves to sketch up images whereas the optical telescope (like the one in plan at Ladakh) uses visual images instead.
Optical telescopes does comprise of a large glass to collect light from source, whereas Radio telescope does have a large antenna or an array of antennas to collect reflected radio waves. In other words Radio telescopes are large RADAR.

Nicely explained. Thanks.

 

[Chinmoy]

Nicely explained. Thanks.

Welcome .........


Please enter a message with at least 30 characters.

 

[Anupu]

Well the difference is simple. As the name suggest, Radio Telescope is not like a normal Optical telescope which is much larger version of binoculars or spy glass.
Radio telescopes does use radio waves to sketch up images whereas the optical telescope (like the one in plan at Ladakh) uses visual images instead.
Optical telescopes does comprise of a large glass to collect light from source, whereas Radio telescope does have a large antenna or an array of antennas to collect reflected radio waves. In other words Radio telescopes are large RADAR.

Sorry but I had to correct, it's not a RADAR . RADAR transmits a signal and receives the reflection back. In space the distances are so long that this would never work for distances.

Nicely explained. Thanks.

The difference between a radio and optical telescope is simple. Optical Telescope as in the one being put up in Ladakh, uses visible spectrum of light to look at space. Radio Telescope use radio waves to look.

The band of electromagnetic waves our eyes can perceive is visible light. But astronomical bodies don't just produce visible light. Our sun or any star for that matter produces almost all possible frequencies of EM including radio waves. These Radio telescope allows us to look at the space in radio frequencies, and gives you data different from optical telescope which helps in understanding the universe better. Their are also microwave telescopes, Infra-red/ UV telescopes, X-ray Telescope, Gamma-ray, Etc. Recently we discovered gravitational waves, thats why it was such a big deal, it gave a new window, new eyes you might say to look at the universe.

All these telescopes gives a different window into the universe, X-ray telescopes are a good way study Black-holes for example. Astrosat had a X-ray telescope on it.

 

[Kshatriya87]

Sorry but I had to correct, it's not a RADAR . RADAR transmits a signal and receives the reflection back. In space the distances are so long that this would never work for distances.


The difference between a radio and optical telescope is simple. Optical Telescope as in the one being put up in Ladakh, uses visible spectrum of light to look at space. Radio Telescope use radio waves to look.

The band of electromagnetic waves our eyes can perceive is visible light. But astronomical bodies don't just produce visible light. Our sun or any star for that matter produces almost all possible frequencies of EM including radio waves. These Radio telescope allows us to look at the space in radio frequencies, and gives you data different from optical telescope which helps in understanding the universe better. Their are also microwave telescopes, Infra-red/ UV telescopes, X-ray Telescope, Gamma-ray, Etc. Recently we discovered gravitational waves, thats why it was such a big deal, it gave a new window, new eyes you might say to look at the universe.

All these telescopes gives a different window into the universe, X-ray telescopes are a good way study Black-holes for example. Astrosat had a X-ray telescope on it.

Thanks for the clarification. But wouldn't it make the radio telescope better for universe exploration?

Sent from my Nexus 5X using Tapatalk

 

[Anupu]

Thanks for the clarification. But wouldn't it make the radio telescope better for universe exploration?

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Hmmm......... Yes and No. You need all types of telescopes for different purposes, it's like asking whether screwdriver or hammer is better. Astrophysicists need all these tools.

Radio Telescopes are useful in studying pulsars, quasars and radio galaxies as they are strong radio sources. They might not be visible from optical telescope as their is a huge region of dust clouds that block them for visible telescopes. Radio telescope might see them better. Then you have different problems where radio telescope are less useful, black-holes for e.g. So it's like you need all of them, and space is mostly a very collaborative field, especially when it comes to telescopes, it wouldn't be tough for a Indian scientist to use the Chinese facility or vice-versa. So it's fine, and we too have radio telescopes one of the most sensitive ones: ORT. As well as others : GMRT, Gauribidanur Radio Observatory

 

[Indx TechStyle]

Hmmm......... Yes and No. You need all types of telescopes for different purposes, it's like asking whether screwdriver or hammer is better. Astrophysicists need all these tools.

Radio Telescopes are useful in studying pulsars, quasars and radio galaxies as they are strong radio sources. They might not be visible from optical telescope as their is a huge region of dust clouds that block them for visible telescopes. Radio telescope might see them better. Then you have different problems where radio telescope are less useful, black-holes for e.g. So it's like you need all of them, and space is mostly a very collaborative field, especially when it comes to telescopes, it wouldn't be tough for a Indian scientist to use the Chinese facility or vice-versa. So it's fine, and we too have radio telescopes one of the most sensitive ones: ORT. As well as others : GMRT, Gauribidanur Radio Observatory

Astrosat inside earth's orbit does it better for me. :grin:

http://www.isro.gov.in/pslv-c30-astrosat-mission/astrosat-completes-100-days-orbit
:biggrin2::biggrin2::biggrin2::biggrin2::biggrin2:

 

[Indx TechStyle]

Recruitment to the posts of technical asst and technicians in LPSC:

Advertisement Number: LPSC/02/2016
Advertisement Date: Apr 25, 2016
Last Date for Submission of Applications online: May 06, 2016
ISRO Centre: Liquid Propulsion Systems Centre (LPSC)
Location: Thiruvananthapuram
Remarks: Recruitment to the posts of technical asst and technicians
Area of Work: Technical Assistant; Technician
Status: Open

Link: http://www.lpsc.gov.in/2recruitment.htm
Source: http://www.isro.gov.in/recruitment-to-posts-of-technical-asst-and-technicians-lpsc

Also check this link:
http://www.isro.gov.in/career?field_isro_location_value[]=Thiruvananthapuram&=Apply

 

[Indx TechStyle]

Story of the week:
MENCA observed the evening exosphere of Mars

The Mars Exospheric Neutral Composition Analyser (MENCA), onboard Indian Mars Orbiter Mission (MOM) is a mass spectrometer, provides in-situ measurements of the neutral composition of the exosphere of the Mars. MENCA is capable of measuring relative abundances of neutral constituents in the mass range 1 to 300 atomic mass unit (amu); the major gases in the Martian atmosphere fall in this range. In addition to acquiring the mass spectra in a specified mass range, the instrument has a provision to track the time variation of the abundances of a set of selectable species. The observation from MENCA will help in understanding the escape of the Martian atmosphere.

At the surface of Mars, the atmosphere is rich in Carbon Dioxide (CO2) and very thin (~6 millbar), about 1% of that of Earth. In the upper part of the Martian atmosphere, at around 100 km, the ultraviolet (UV) rays of sunlight breaks CO2 molecule into Carbon Monoxide (CO) molecule and Oxygen (O) atom. The CO also can be broken by solar UV radiation into C and O atoms. The oxygen atoms are about three times lighter than the CO2 molecules and two times lighter than CO molecules. Hence, oxygen atoms have larger scale height, which means it's density at higher heights falls-off slower compared to that of CO and CO2. Hence, there comes a region in Martian upper atmosphere where the number of O atoms exceeds the number of CO2 molecules. The altitude at which this change-over (CO2 dominance to O dominance) happens depends on how deep the solar UV rays penetrate the Mars atmosphere.

The figure below shows the MENCA-measured abundances of the major gases, namely, atomic Oxygen (O, 16 amu), Nitrogen molecule (N2) plus Carbon Monoxide (CO, 28 amu), and Carbon Dioxide (CO2, 44 amu), in the exosphere of Mars on 21 December 2014, during Martian evening (around sunset in the sky of Mars), from 265 km to 400 km altitude. These observations correspond to moderate solar activity conditions and when MOM’s periapsis altitude was the lowest (~265 km).

MENCA observations have shown that the abundance of Oxygen exceeds that of Carbon Dioxide at an altitude of 270 ±10 km during Martian evening. From the variation of the abundances of different gases with the altitude, the temperature of the Martian exosphere was found to be about 271 ±5 K (-7 to +3 °C). These measurements were conducted when Mars was closer to the Sun in its elliptical orbit (i.e., at perihelion); it is still cooler when Mars is farthest from the Sun.

These are the first in-situmeasurements of composition during the local dusk sector on Mars, which would help in setting up the boundary conditions for models dealing with thermal escape processes. The models are basically used to understand the evolution of atmospheres to its present state and its response to various forces.

It is important to note that the CO2-to-O dominance transition altitude differs in day and night, and also varies with different seasons of Mars (due to similar tilt of rotation axis as on Earth, Mars has seasons similar to that on Earth), as well as depends on how active is the Sun.

MENCA has provided several measurements of the composition of the key species of the Martian neutral exosphere.
The above results are published in American journal, Geophysical Research Letters. vol. 43, pp. 1862–1867, (2016).

Abundances of the major gases measured by MENCA

Specifications of MENCA
Story of the Week - Archive
May 02, 2016 : MENCA observed the evening exosphere of Mars
Apr 25, 2016 : MOSDAC completes a decade of Meteorological and Oceanographic satellite data services to the Nation
Apr 18, 2016 : Indigenous development of Traveling Wave Tube Amplifier (TWTA) for Space borne payloads
Apr 11, 2016 : IIST Secures 8th Position in all India Universities Ranking
Apr 05, 2016 : Geo-spatial Technology for Expansion of Sericulture in India
Mar 28, 2016 : First Theme based On-line Outreach Programme conducted at IIRS on Geo-spatial Technologies for Urban Planning
Mar 21, 2016 : Gadanki Ionospheric Radar Interferometer (GIRI) established at NARL

• 1 of 8
  
• next ›

Courtesy: ISRO - Government of India

 

[Indx TechStyle]

PSLV C-33/IRNSS-1G Update
May 02, 2016
Orbit Determination results from the third LAM firing are: apogee X perigee height was changed to 35813km, 29050km, Inclination is 5.72deg. Orbital period now is 21hr 08m 09sec

 

[Indx TechStyle]

ISRO LPSC Recruitment on Various Post 2016 Apply Online | SarkariBoy
ISRO Liquid Propulsion Systems Centre LPSC Kerala has given employment notification for the various post technical (Technical Assistant, Mechanic, Fitter, and other) recruitment 2016 Eligible candidates can apply online. For more details Eligibility, Qualification, Age Limit, Exam Date read full notification below and apply online.

Important Dates :

Application Begin : April 2016
Last Date for Apply Online : 06/05/2016
Last Date Receipt Form : 17/05/2016

Application Fee :

General/OBC : 0/-
SC/ST/PH : 0/-
Online Fill the Online Application Form
Not Application Fee for All Candidates.

Send Application Form to : The Administrative Officer, Recruitment Section, Liquid Propulsion Systems Center Valiamala PO Thiruvananthapura, Kerala Pin Code – 695547

Age Limit as on 06/05/2016 :

Maximum Age : 35 Years
Age Relaxation Extra as per ISRO Recruitment Rules

Vacancy Details Total : 42 Post

Some Useful Important Links

Apply Online : Click Here
Download Notification : Click Here
Official Website : Click Here


Credit : SarkariBoy

 

[Chinmoy]

Sorry but I had to correct, it's not a RADAR . RADAR transmits a signal and receives the reflection back. In space the distances are so long that this would never work for distances.


The difference between a radio and optical telescope is simple. Optical Telescope as in the one being put up in Ladakh, uses visible spectrum of light to look at space. Radio Telescope use radio waves to look.

The band of electromagnetic waves our eyes can perceive is visible light. But astronomical bodies don't just produce visible light. Our sun or any star for that matter produces almost all possible frequencies of EM including radio waves. These Radio telescope allows us to look at the space in radio frequencies, and gives you data different from optical telescope which helps in understanding the universe better. Their are also microwave telescopes, Infra-red/ UV telescopes, X-ray Telescope, Gamma-ray, Etc. Recently we discovered gravitational waves, thats why it was such a big deal, it gave a new window, new eyes you might say to look at the universe.

All these telescopes gives a different window into the universe, X-ray telescopes are a good way study Black-holes for example. Astrosat had a X-ray telescope on it.

Thanks for the detailed explanation. I did used RADAR term for just a layman use.

 

[Indx TechStyle]

India and France jointly released a set of two commemorative postage stamps, highlighting 50 years of space co-operation between the two countries


Department of Posts, India and La Poste, France released joint Stamps to commemorate 50 years of co-operation in space between India and France. The stamps were jointly released by Prime Minister of India and President of France. The stamps contain the images of "Satellite with ARgos and ALtika" (SARAL) and Megha-Tropiques satellite. The two satellites were developed jointly by Indian Space Research Organisation (ISRO) and the Centre National d’Etudes Space (CNES) of France.

The satellites Megha-Tropiques and SARAL were launched by the Indian PSLV-C18 in 2011 and PSLV-C20 in 2013 respectively. The data provided by these satellites is being utilised by ISRO and CNES and is being shared with other countries. The partnership between India and France in space started in 1964 when the two countries entered into a protocol agreement for cooperation in space research. The countries have since continued to work together for the advancement of peaceful uses of outer space.

The honorable Prime Minister also visited the CNES Space Centre, Toulouse on the following day (11/04/15) of the release of stamps.

Link to Press Release from Postal Department

Indian Stamp – SARAL Indian Stamp - Megha Tropiques

French Stamp – SARAL French Stamp – MeghaTropiques



Photos of Stamp Release Occasion

 

[Indx TechStyle]

ISRO Signs MoU with 37 countries for exploration and use of outer space
Capital Market | May 04, 2016 04:41 PM IST

Indian Space Research Organisation (ISRO) of Department of Space, Government of India has signed MoU/ Cooperative agreements for exploration and use of outer space with 37 countries viz. Argentina, Australia, Brazil, Brunei Darussalam, Bulgaria, Canada, Chile, China, Egypt, France, Germany, Hungary, Indonesia, Israel, Italy, Japan, Kazakhstan, Kuwait, Mauritius, Mexico, Mongolia, Myanmar, Norway, Peru, Republic of Korea, Russian Federation, Saudi Arabia, Spain, Sweden, Syria, Thailand, The Netherlands, Ukraine, United Kingdom, United Arab Emirates, United States of America and Venezuela.

The fields to explore newer research activities addressed in these MoUs include - Joint development of advanced scientific instruments to observe earth and universe; joint realization of satellite missions; jointly carrying out calibration and validation experiments; conducting airborne campaign with advanced instruments; deep space navigation and communication support for space science missions; development of advanced technologies for building and launching of spacecrafts for earth observation and space science exploration.

Application possibilities in the field of remote sensing addressed in these MoUs include - natural resource management; vegetation biomass estimation; meteorological & oceanographic applications; atmospheric parameter retrieval & modelling; climate monitoring and weather forecasting; disaster management support.

 

[Kyubi]

Isn't China installing/installed one which is the biggest in the world?

It is a Radio telescope which China is building

Sent from my XT1068 using Tapatalk

 

[Indx TechStyle]

NMDC ties up with ISRO for mineral mapping

NMDC Ltd has teamed up with Indian Space Research Organisation (ISRO) to make use of satellite-based geological mapping capability for mineral exploration.

A memorandum of understanding was signed between NMDC and ISRO’s National Remote Sensing Centre here today opening up the possibilities for NMDC to use satellite technology for mineral exploration and a host of other related ventures.

NMDC becomes the first company under the Ministry of Steel to use satellite-based geological mapping.

Under the memorandum, NMDC will establish a Remote Sensing and GIS Laboratory at its head office in Hyderabad for interpretation of satellite data.

LN Mathur, Executive Director (Resource Planning & Safety) and PG Diwakar, Deputy Director, Remote Sensing Application Area, NRSC, signed the memorandum on behalf of NMDC and NRSC respectively.

 

[Indx TechStyle]

ISRO Aims To Conquer Skies With Its Own Reusable Vehicle

CHENNAI: Within weeks after achieving landmark victory by dedicating NAVIK (Navigation by Indian Constellation) to the nation, the Indian Space Research Organisation (ISRO) is on course to launch its ‘maiden’ Reusable Launch Vehicle Technology Demonstrator (RLV-TD) later this month. The launch is tentatively scheduled for May 23. However, a final decision will be taken after the Mission Readiness Review (MRR) committee meets on May 11 under the chairmanship of BN Suresh that gives technical clearance for the launch.

It is a new technology, which ISRO scientists are trying to conquer.[QUOTE]Speaking to Express, P Kunhikrishanan, director, Satish Dhawan Space Centre (SDSC-SHAR), Sriharikota, confirmed that all systems had arrived at the spaceport and the integration was progressing smoothly as per the schedule.[/QUOTE]

ISRO has been keeping a low profile since it is entering a new space. However, this launch is special for simple reason that it’s a first step towards realising a Two Stage To Orbit (TSTO) fully re-usable vehicle that can launch satellites into orbit around earth and then re-enter the atmosphere making space missions economically viable.

It will be a major breakthrough in space exploration and space utilisation. A reusable launch vehicle is the unanimous solution to achieve low-cost, reliable and on-demand space access. It would be a Reusable Launch Vehicle Technology Demonstrator Hypersonic Experiment (RLV-TD HEX1) wherein the hypersonic aero-thermo dynamic characterisation of winged re-entry body along with autonomous mission management to land at a specified location and characterization of hot structures are planned to be demonstrated. This would be followed by the landing experiment (LEX), return flight experiment (REX) and scramjet propulsion experiment (SPEX).

RLV-TD being integrated at Satish Dhawan Space Center, Sriharikota

Recently, ISRO Chairman AS Kiran Kumar, delivering the annual Air Chief Marshal LM Khatre lecture in Bengaluru, said, “The RLV will be taken to a height of over 70 km and released for its re-entry into the atmosphere.” Meanwhile, a senior ISRO official said the first experimental flight did not have landing option. The vehicle will re-enter the atmosphere and drop into the sea. To a query, he said the vehicle can’t be retrieved. The RLV-TD has been configured to act as a flying test bed to evaluate various technologies, namely, hypersonic flight, autonomous landing, powered cruise flight and hypersonic flight using air-breathing propulsion, he added.

What are RLVs

A new generation of vehicles that can launch satellites into the orbit and then re-enter the atmosphere
A Reusable Launch Vehicle (RLV) is the space analog of an aircraft
It takes off vertically on the back of an expendable rocket and then glides back down like an aircraft
During landing phase, an RLV can either land on a runway or perform a splashdown
The main advantage of an RLV is it can be used multiple times, hopefully with low servicing costs

Source>>

 

[Indx TechStyle]

What Isro earns from its commercial services

The Indian Space Research Organisation (Isro) generates revenue by leasing the Insat/ GSAT transponders, sale of satellite data and other commercial services. However, it earns just over 10% of the money allocated to it by the govt.

 

[Indx TechStyle]

CENTRALISED RECRUITMENT TO THE POST OF SCIENTIST/ENGINEER 'SC' IN THE DISCIPLINES OF ELECTRONICS, MECHANICAL AND COMPUTER SCIENCE
Visit the Page

Advertisement Number:
ISRO HQ:ICRB:01:2016
Advertisement Date:
May 05, 2016
Last Date for Submission of Applications online:
May 25, 2016
ISRO Centre:
Centralised Recruitment (ICRB)
Location:
Bengaluru
Remarks:
RECRUITMENT TO THE POST OF SCIENTIST/ENGINEER 'SC'

Area of Work:
Scientists/Engineers
Status:
Open
Attachments:

COMPUTER SCIENCE - 2009

COMPUTER SCIENCE - 2011

COMPUTER SCIENCE - 2013

COMPUTER SCIENCE - 2014

COMPUTER SCIENCE - 2015

ELECTRONICS - 2015

ELECTRONICS - 2011

ELECTRONICS - 2013

 

[Indx TechStyle]

ELECTRONICS - 2014

MECHANICAL - 2011

MECHANICAL - 2012

MECHANICAL - 2013

MECHANICAL - 2014

MECHANICAL - 2015

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