پرتاب اولین ماهواره سیستم ناوبری ملی هند IRNSS

هند اولین ماهواره سیستم IRNSS  را پرتاب نمود. بدین ترتیب اولین قدم در ایجاد یک سیستم ناوبری با ماهواه های GEO در منطقه شبه قاره برداشته شد که شامل 7 ماهواره است. 

http://www.nasaspaceflight.com/2013/07/indian-pslv-launch-irnss-r1a/ 

 مرجع فرانسه:

http://www.generation-nt.com/irnss-inde-satellite-gps-navigation-programme-actualite-1755922.html

انهدام سه ماهواره GLONASS

سلام  

باز هم بدشانسی دیگری برای سیستم Glonass. سقوط ماهواره بر روسی چند لحظه پس از پرتاب باعث منهدم شدن سه ماهواره جدید گلوناس شد. این دومین بار در طی سه سال گذشته است که این مشکل برای گلوناس پیش می آید. 

http://en.rian.ru/russia/20130702/182002715/Russian-Proton-M-Rocket-Falls-Shortly-After-Launch.html

جزوه تفکیک

سلام 

جزوه زیر را برای دوست عزیزم آقای مهندس فرخ شفیعی برای کاربران نقشه برداری آماده کرده است. کسانی که کار تفکیک انجام میدهند میتوانند از آن استفاده کنند. در ضمن اگر نظری درمورد آن دارید یا مشکلی دارد، منعکس کنید تا به ایشان اطلاع دهم. 

دانلود

شفق قطبی

This ultraviolet image shows an auroral display as seen from space, overlaid on top of a visible image of Earth. The false-color reds indicate the brightest aurora and blue the dimmest. The brightest aurora is found at midnight.

The ethereal green glow of Aurora Australis high over Concordia station on 18 July 2012. It was taken by ESA-sponsored scientist Alexander Kumar and his colleague Erick Bondoux from about 1 km from the station, located in the Antarctic at –75°S latitude.

The French–Italian Concordia station's programme of research includes glaciology, human biology and the atmosphere. ESA uses the base to prepare for future long-duration missions beyond Earth. During the winter, Concordia is under almost total darkness, with an average temperature of –51°C and a record low of –85°C. It is an ideal place to study the effects on small, multicultural teams isolated for long periods in an extreme, hostile environment.

Auroras occur frequently over both the North and South polar regions, but are often difficult to see from populated areas. During periods of increased solar activity, the lights sometimes extend to populated latitudes. This year has seen unusually high solar activity; most recently, on 14 July, Northern Lights could be seen as far south as Duluth, Minnesota, USA.

منبع :esa  

اولین تعیین موقعیت با گالیله

12/02/2013 - first Galileo-only position fix received

On March 12th, 2013, between 10 and 11 o' clock, a first positioning test based on the 4 first operational Galileo satellites was conducted by ESA. This first position fix returned an accuracy range of +/- 10 meters, which is considered as very good, considering that only 4 satellites (out of the total constellation of 30) are already deployed. 

http://ec.europa.eu/enterprise/policies/satnav/galileo/index_en.htm#h2-1