Prateep Basu

NSR’s Satellite-Based Earth Observation (EO), 7th Edition is the industry-leading analysis of the fast-paced global EO market. Starting with the data from satellites, through to value-added services and on to information products, this completely revised NSR report offers the most comprehensive analysis of the fast growth EO markets for each vertical and region.

As a long-term investor in space technology and infrastructure, India is currently among the top nations in the world in terms of government space investment. Though space investment has been growing over the past few decades, India's space competitiveness has suffered from the absence of a globally reputed, private space industry. The present work provides key insights into India's stance in the global market and its emergence as a space power, and puts in context the emergence of New Space… Show more

As a long-term investor in space technology and infrastructure, India is currently among the top nations in the world in terms of government space investment. Though space investment has been growing over the past few decades, India's space competitiveness has suffered from the absence of a globally reputed, private space industry. The present work provides key insights into India's stance in the global market and its emergence as a space power, and puts in context the emergence of New Space globally. Show less

Nano and Microsatellite Markets, 2nd Edition continues NSR’s industry-leading analysis of the rapidly evolving and increasingly competitive sub-100 kg satellite market. The fast pace of development and diversification is captured through over one hundred, 10-year forecasts of satellite launch rates, mass characteristics, and manufacturing and launch revenue generated. NSR’s assessment extends from launch volume and mass forecasts to take a deeper look at regional and application-specific… Show more

Nano and Microsatellite Markets, 2nd Edition continues NSR’s industry-leading analysis of the rapidly evolving and increasingly competitive sub-100 kg satellite market. The fast pace of development and diversification is captured through over one hundred, 10-year forecasts of satellite launch rates, mass characteristics, and manufacturing and launch revenue generated. NSR’s assessment extends from launch volume and mass forecasts to take a deeper look at regional and application-specific trends, and assess emerging technologies that could be industry game changers. NSR’s Nano and Microsatellite Markets, 2nd Edition offers the insight necessary to achieve a comprehensive understanding of the key dynamics and opportunities characteristic of the sub-100 kg satellite sector. Show less

India is one of the very few developing countries that made an early investment into space technology and has sustained it over five decades. The very nature of the beginning of the Indian space program fundamentally differs from some of its counterparts in outer space. The Indian government has typically taken a stand on utilization of outer space for civilian benefits, and development of a national space infrastructure that can independently serve the vision of facilitating the civilian… Show more

India is one of the very few developing countries that made an early investment into space technology and has sustained it over five decades. The very nature of the beginning of the Indian space program fundamentally differs from some of its counterparts in outer space. The Indian government has typically taken a stand on utilization of outer space for civilian benefits, and development of a national space infrastructure that can independently serve the vision of facilitating the civilian benefit program. This particular stand has eventually created a vibrant space program that has indigenously developed capabilities in space, launch, and ground systems on the upstream and specific civilian programs (resource monitoring, meteorology, disaster management, etc.) on the downstream Show less

NSR’s Satellite Manufacturing and Launch Services, 5th Edition (SMLS5) provides the industry’s most comprehensive and up-to-date assessment of activity in global manufacturing and launch markets. Extending from 2014 market performance to expectations for the next ten years, SMLS5 addresses how emerging trends will impact satellite design and procurement and what this means for the main players. Applying extensive proprietary data and leveraging NSR’s thorough analysis of drivers in all major… Show more

NSR’s Satellite Manufacturing and Launch Services, 5th Edition (SMLS5) provides the industry’s most comprehensive and up-to-date assessment of activity in global manufacturing and launch markets. Extending from 2014 market performance to expectations for the next ten years, SMLS5 addresses how emerging trends will impact satellite design and procurement and what this means for the main players. Applying extensive proprietary data and leveraging NSR’s thorough analysis of drivers in all major satellite service markets, SMLS5 offers a clear view into region and application specific demand for satellites over the coming decade Show less

NSR’s Unmanned Aircraft Systems (UAS) via Satellite is a new report providing comprehensive analysis of the UAS markets, and assesses their impact on and use of satellite communications. Building on years of data and analysis from NSR’s coverage of Unmanned Aerial Vehicles (UAVs) for government and military markets, this new study presents readers with an in-depth look at regional conditions, capacity demand, and drivers for High Altitude Long Endurance (HALE) and Medium Altitude Long Endurance… Show more

NSR’s Unmanned Aircraft Systems (UAS) via Satellite is a new report providing comprehensive analysis of the UAS markets, and assesses their impact on and use of satellite communications. Building on years of data and analysis from NSR’s coverage of Unmanned Aerial Vehicles (UAVs) for government and military markets, this new study presents readers with an in-depth look at regional conditions, capacity demand, and drivers for High Altitude Long Endurance (HALE) and Medium Altitude Long Endurance (MALE) UAS globally over the next ten years. Show less

The gas–liquid interface dips during the draining of a liquid through a discharge port of a vessel or a tank. The dip develops into a gas-core vortex which subsequently enters the discharge port. This entry can be either gradual or sudden, depending on the intensification of the rotational flow currents during the draining process. The extension of the gas-core into the drain port reduces the flow area and consequently the flow rate. In liquid propellant stage of rockets, this phenomenon can… Show more

The gas–liquid interface dips during the draining of a liquid through a discharge port of a vessel or a tank. The dip develops into a gas-core vortex which subsequently enters the discharge port. This entry can be either gradual or sudden, depending on the intensification of the rotational flow currents during the draining process. The extension of the gas-core into the drain port reduces the flow area and consequently the flow rate. In liquid propellant stage of rockets, this phenomenon can have an adverse effect on the performance of engine and may lead to under utilisation of the propellant. In this paper, the authors have tried to give theoretical explanations for the formation and intensification of such gas-core vortices, using the results obtained by simulating a gas–liquid flow, drained axisymmetrically from an orifice beneath the liquid. These investigations have been carried out using the commercial ANSYS Fluent code. The flow is modelled using the volume of fluid (VOF) method, which obtains the volume fraction of fluid elements throughout the domain and tracks the gas–liquid interface motion as it descends during drainage. The effect of initial swirl velocity in the liquid and the shape of the container on the formation of these gas-core vortices are studied using the results obtained from numerical simulations to get the physical insight of the involved flow mechanism. Show less

The gas-liquid interface dips during the draining of a liquid through a discharge port of a vessel or a tank. The dip develops into a gas-core vortex which subsequently enters the discharge port. This entry can be either gradual or sudden, depending on the intensification of the rotational flow currents during the draining process. The extension of the gas-core into the drain port reduces the flow area and consequently the flow rate. In liquid propellant rocket motors, this phenomenon can have… Show more

The gas-liquid interface dips during the draining of a liquid through a discharge port of a vessel or a tank. The dip develops into a gas-core vortex which subsequently enters the discharge port. This entry can be either gradual or sudden, depending on the intensification of the rotational flow currents during the draining process. The extension of the gas-core into the drain port reduces the flow area and consequently the flow rate. In liquid propellant rocket motors, this phenomenon can have adverse effect on the performance as well as lead to under utilisation of the propellant. In this paper, the authors have tried to find the reason why such an air-core vortex develops in the first place, and the factors that influence its intensification over time, as reported in literature. These investigations have been carried out through simulations done using the commercial ANSYS Fluent code to validate the findings from the CFD results. The simulations are carried out using the volume of fluid (VOF) method, which obtains the volume fraction of each of the fluid throughout the domain and thereby captures the gas-liquid interface motion. Thereafter, the air-core vortex height predictions are validated with results reported in the literature. Show less

Meshless methods applied to computational fluid dynamics (CFD) are relatively new areas of research. The local RBF-DQ is a natural meshless method, which combines derivative approximation by differential quadrature (DQ) method and functional approximation by radial basis function (RBF), so that the derivatives of dependent variables can be directly approximated on a scattered set of nodes. In this paper, we mainly concentrate on the multiquadric RBFs, since they have exponential convergence… Show more

Meshless methods applied to computational fluid dynamics (CFD) are relatively new areas of research. The local RBF-DQ is a natural meshless method, which combines derivative approximation by differential quadrature (DQ) method and functional approximation by radial basis function (RBF), so that the derivatives of dependent variables can be directly approximated on a scattered set of nodes. In this paper, we mainly concentrate on the multiquadric RBFs, since they have exponential convergence. The ability of the method of RBF-DQ to deal with the problems of fluid mechanics is demonstrated in this paper by applications to different types of flow problems. The comparison of this method based on accuracy and the speed of the method, with other established schemes like FVM, FDM, etc., is in process and being carried out presently. Results obtained are compared with analytical solutions and published data. It was found that the present mesh-free results agree very well with available data in the literature. Show less