Rosetta: The Ambition to create Space history!
Rosetta marks the beginning of a new era in Space exploration! An Era, where we are able to collect scientific data from a comet that is 4.6 billion years old, to answer one of the most intriguing questions of mankind “Where did the water on Earth come from?”.
After 957 days of hibernation. Rosetta has already taken several pictures of the comet besides information about the chemical composition and smell of 67p (Read more: The smell of a comet). Rosetta simply continues to captivate us and send our imagination into overdrive!
Rosetta had to travel more than a few billion kilometers to be within 100 kilometers of the comet 67p (Churyumov-Gerasimenko), then it advanced to 50km, 30 and now to just 10km! On November 12th, 2014, Rosetta will launch the lander “Philae” to land on the comet.
In an attempt to popularize the mission, the European Space Agency (ESA) has released a short film titled “Ambition” with colloboration with Platige Image.
The short film is inspired by the theme “Science meets Science fiction”! Well, what can I say, you got that one right, ESA! The entire Rosetta mission does feel like Science fiction! 🙂 Go Rosetta!! Rosetta is well and truly, the defining moment for Space exploration in the 21st century.
The entire earth photographed from space each day
With the increasing number and enhanced resolution of Earth-observing satellites tracking occurrences on our planet from above is becoming feasible. The launch of World-View-3 in August 2014 has advanced the resolution of sensors in space once more and now stands at incredible 31cm pixel size allowing to capture small cars and even mailboxes.
But is it indeed possible to scan the entire earth each day? – This is exactly the mission of the San Fransisco based Company Planet Labs. In January this year Planet Labs launched the first swarm of 28 mini satellites and complemented the mission with subsequent 43 units in order to reach a total number of 71 “Doves”, as the company calls their mini satellites. The “Doves” are designed as nimble imagers, which is a major design difference to the prevailing philosophy of building powerful, rigorously tested and thus expensive earth observation satellites. The advantage of the mini satellites over other missions is therefore not their resolution of 5m (there are EO satellites with a much greater resolution) but first their number, making daily vast scans of the Earth’s surface possible, and secondly their simplicity ending up in cheap design and operating costs. The latter reason explains also why an only two year old company was able to gain ground in a rather cost expensive and knowledge driven sector: The company does not have the high risk of losing a satellite, in opposite, they can be sent into space without begin perfected, as continuously updated satellites with improved units can be re-launched in order to replace failed ones. – The need for long lasting testing is therefore spared.
One of the problems that the company faces in terms of everyday global data coverage is the removal of cloudy pixels in their stitched images. Planet Labs is developing algorithms to choose the best and clearest pixels for a world wide mosaick, but solely detecting clouds will not solve the problem as cloud shadows, for example, are as severe as clouds themselves.
“Fresh data from any place on Earth is foundational to solving commercial, environmental, and humanitarian challenges”. With this scope, the company addresses applications as change detection, customer maps and basemaps, persistant monitoring, planning and logistics for clients in diverse industrial sectors ranging from agriculture, energy, infrastructure and mapping to natural resources.