In today's show we uncover the mystery of satellite bases from me and talk about Astrosat. Hi there, I am Antippy and you are watching The Spirit of the Show. Now one of the most popular topics in news these days is the Astrosat launched by Israel and I'm sure most of you must have heard about it. But is it really that big a deal? To describe Astrosat we can say that it is a science machine focused on multi-webdenstereo outer space. Or in simpler words, it is just another IRS class satellite with a small difference that instead of looking back towards Earth, it looks into the space. Well, it is not the first time an observatory has been launched to space, some well known names being Hubble and Spitzer. It is certainly the first time for India. Actually, it is a lesser known fact that the evolution of Astrosat is based upon Indian X-ray astronomy experiment conducted back in 1986. Astrosat is designed for broadband astronomy covering visible near UV, far UV, soft X-ray and hard X-ray reasons of the electromagnetic spectrum. A high energy radiation study cannot be formed from a ground-based station due to the fact that most of the UV and the X-rays are lost due to absorption by the atmosphere. This is where high altitude weather balloons and satellites become important for scientific observation. The lift of mass of the spacecraft is 159.13 grams, out of which 832 kilograms is the mass of the instruments. The rest of the weight comprises of the power equipment, transponders and propellant for a 5-year-old machine life. Astrosat is being launched by the X-ray version of the PSLVC30 rocket into a near-earth equatorial orbit at an altitude of 650 km and an inclination of 6 degrees. Now one may raise a question here that, a similar Chandraryak's Co-Binasa has a perigee of 14,000 trillion kilometers and an apogee of 134,500 kilometers, which provides it a very long continuous observation time as compared to astrocyte, which on the other hand cannot be said to crack a particular object in space for more than 50 minutes. But is it necessarily a bad thing? Actually it is not. The thing is, astrosat is a general purpose observatory, not meant to look closely, but to provide a broader general picture of the observable universe. And secondly, with a shorter orbital period, it can view a given part of space 14 times a day at regular intervals. This can help us crack any changes that occur in that part of space with better accuracy. The other term associated with the orbit of the spacecraft is the inclination of 6 degrees. There can be two reasons for that. First, it is done to extend the workspace of the spacecraft, that is, if the observatory orbiting in an equatorial orbit with zero inclination has a permitted observation space of 60 degrees about the direction of motion, then an inclination of 6 degrees can add the same amount of observation space in both hemispheres. The second reason can be to provide a better insight into the charged particle anomaly over the southern Atlantic Ocean, which would not be possible with a zero inclination. Coming back to the point, if all goes well and the weather is supportive, we will have a launch on 28th September at around 10 am. A ground command and control center for the mission is located at Astro telemetry tracking and control network in Pangloric, and the tracking is provided by the Indian Deep Space Network in Beallu. At an average, Astro satellite will generate about 440 GB of data per day, which will be downloaded during the visible orbits via an 11-meter antenna at IDSN. This mission is being described as proposal-driven observatory with scientific focus on. Samultaneous multi-wibble monitoring of intensity variation of broad range of cosmic sources. Monitoring the X-ray sky for neutronsients, sky surveys in hard X-ray and UVU are the three banks. Broadband spectroscopic studies of X-ray binaries, A-GNs, SNRs, cluster galaxies, instiller colony, study of periodic and non-periodic variability of X-ray sources, and observation of charged particle anomaly over the southern Atlantic Ocean. Let us now look into the instruments being sent with astrosight for the purpose of achievement of scientific objectives. The first being the twin ultra-valid image telescopes with an aperture of 380mm each. This instrument will study the visible, near UV and far UV banks of the spectrum one at a time by using a combination of filters. Second instrument is three units of large areas in non-propectional counters covering the medium energy X-rays. As the name says, it is a proportional counter. That is, it evaluates the number of same energy photons incident with respect to the whole bank. Lack species has the maximum effective area of 6000 square centimeters at energy values of 10k electron volts. The next one is soft X-ray water telescope with quantum mirrors in an X-ray CCD sensor, covering the energy range of 0.328 kHz. The maximum effective area in this case is around 128 square centimeters at 1 kHz. Fourth instrument is the cadmium zinc-del-right image covering the heart X-ray region of the spectrum, with energy values from 10 to 150 kHz. It also incorporates a normal incidence sensor with efficiencies close to 100%, and an effective area of around 480 square centimeters. Fifth instrument is a scanning sky monitor consisting of three poision sensitive proportionate counters with quid mask. This whole assembly will be placed on a rotating platform to scan the available sky once every 6 hours so as to locate any transient X-ray source. A charged particle monitor has also been included as a payload in order to study the South Atlantic Enominee region, which is high fluxes of low energy protons and electrons. The data from CPM will help preventing any damage to other equipment due to the anomaly. All these payloads of the spacecraft work in Ureson in order to provide a broad spectrum map of the outer space. At the same time, Astrosat itself works in coordination with land-based visible and regular telescopes to obtain a full spectral analysis. A number of organizations have been involved in the development of Astrosat. A few of the notable names are isrosatlight center, data institute of fundamental research, Indian Institute of Astrophysics, Roman Research Institute, Vikram Saravai Space Center, University of Lancaster, Canadian Space Agency, Laboratory for Electro-Optics, and Inter-University Center for Astronomy and Astrophysics. At last, we arrived at the final question. Will the observatory be open for public research? The answer is yes. While the first year is fully occupied by performance verification phase and guaranteed time, Indian Proposals will be entertained from second year. However, foreign institutes like CSA and University of Lancaster enjoy reserve time in the program. On final note, I wish the Astrosat program a success so that young minds of India can be inspired to take astronomy as a subject and make a life in space research.