Friday, 14 February 2014

India’s SBAS to roll out soon

India’s GPS-Aided Geo Augmented Navigation (Gagan) system, jointly developed by Airports Authority of India (AAI), the Indian Space Research Organization and Raytheon, has been awarded certification for in Required Navigation Performance (RNP) 0.1 operations. Achieved with the help of quasi-U.S. government non-profit MITRE Corporation, the certification makes it the world’s fourth SBAS system certified for operational use.


The first test flight using the system will fly an approach in mid-2014 from Ahmedabad in the western state of Gujarat. The aircraft is likely to be an AAI-owned Beechcraft aircraft, according to S.V Satish, general manager (ATM-Gagan), AAI. Raytheon has built 15 ground reference stations for the Gagan System, which will provide satellite-based navigation for civil aviation over Indian airspace and adjoining areas in South and Southeast Asia.


The Gagan system was installed to advance safety and improve efficiency of airlines operating in Indian skies. Aircraft equipped with satellite-based augmentation system (SBAS) receivers may utilize Gagan signals in Indian airspace for en route navigation and non-precision approaches without vertical guidance, enabling them to follow more efficient flight paths through congested airspace, noise sensitive areas and difficult terrain.



“The enhanced navigation capability available through Gagan improves air travel for all parties–airlines, passengers and air traffic authorities,” said Brian Hickey, director, Raytheon Navigation and Landing Systems. “In addition to enhancing air traffic safety, the system will result in increased efficiencies and lower costs for Indian aviation.”



The reference stations have been strategically placed in India to optimize signal availability, with uplink stations, master control stations, a communication network and associated software all integrated with Geostationary Earth Orbit satellites transmitting GPS corrections in C-Band and L-Band.



Gagan provides coverage for the entire Indian Flight Information Region via broadcast signals from the Indian-built GSAT 8 and GSAT 10 satellites.



Source : AIN Online , 13th Feb 2014

Bhuvan Upgraded: Mapping Tool, 2.5D City Models, Better High-Res Imagery & Others

Indian Space Research Organization’s National Remote Sensing Centre (NRSC) has informed that it recently released upgraded its Google-Earth like satellite mapping tool Bhuvan, adding several new features, datasets and services. These include -

Bhuvan Logo

- Bhuvan Mapper: NRSC has released a web-based mapper to allow users to add places of interest across various categories along with a description to the available maps or update the existing maps with new information on a place.


It has also released an Android app which allows users to upload map data from their neighbourhood to Bhuvan. Similar to Bhuvan’s Android app which was released last August, Bhuvan Mapper is also not available on Play Store and one can download the app from the Bhuvan website.


We wonder why is NRSC providing direct links to its Android app on its website, rather than publishing them on Google Play Store, since we feel they are essentially limiting the discoverability of the app through this approach. This might also raise security concerns among users, since people are usually wary of installing third party apps.


- 2.5D City Models
: Bhuvan’s 2D viewer has now been updated with 2.5 D models of buildings, Infrastructure and recreational areas for 136 towns across India.


- High Resolution Imagery: 
It has added improved high resolution imagery with spatial resolution of one meter for 55 cities and towns from the mapping satellite Cartosat-2 besides the existing imagery from Cartosat-1 of spatial resolution of 2.5 meters.

Bhuvan High Resolution Imagery


- Bhuvan Collaborative Portal: NRSC’s Bhuvan Collaborative portal now allows users to share, access and upload pests and disease related information in an almost real-time basis. The organization says this portal will serve as a visualization tool for spatial representation of pest and disease incidence reports.


- Disaster Services
: NRSC has published a flood hazard map for Odisha, which has been prepared from the information on flooded areas in Odisha during various floods from 2001-2013.


- Support for International Disaster Programs
: NRSC is now extending satellite data support through various International Disaster programs like International Charter Space and Major Disasters for International Disaster events; Sentinel Asia Framework & United Nations Platform for Space-based Information for Disaster Management and Emergency Response (UN-SPIDER), United Nations Economic and Social Survey of Asia and the Pacific 2013 (UNESCAP).


- Thematic Services
: New datasets have been added to Bhuvan’s Thematic services which allows users to select, browse and query the thematic datasets and integrate them into their systems as OGC (Open Geospatial Consortium) Web Services. The new datasets added are LULC (Land Use Land Cover) 50K: 2011-12 covering 12 states, LULC 10K covering 62 districts, erosion, salt affected and water logged area, water bodies and urban sprawl.


- Open Data Archive
: The open data archive is extending its services through global coverage products GAC-NDVI and through new products under Terrestrial sciences (Water Fraction) and Ocean Sciences (Tropical Cyclone Heat Potential, Oceanic Heat Content, Wind Products). NRSC also mentioned that it has integrated the latest 2011 LISS III Datasets and improved CartoDEM data with new version data.


- OSCAT
: The Oscat 3D visualization viewer now supports Opensource 3D, allowing users to visualize global data from a Oceansat scatterometer without a plugin. It has also added time series visualization in the viewer, allowing users to view datasets from Feb, May, Aug and Oct 2012.



Source : Media Nama , 12th Feb 2014