The Hellenic Navy (HN) (Greek: Πολεμικό Ναυτικό, Polemikó Naftikó, abbreviated ΠΝ) is the naval force of Greece, part of the Greek Armed Forces. The modern Greek navy has its roots in the naval forces of various Aegean Islands, which fought in the Greek War of Independence. During the periods of monarchy (1833–1924 and 1936–1973) it was known as the Royal Navy (Βασιλικόν Ναυτικόν, Vasilikón Naftikón, abbreviated ΒΝ).The total displacement of all the navy's vessels is approximately 150,000 tons.The motto of the Hellenic Navy is "Μέγα το της Θαλάσσης Κράτος" from Thucydides' account of Pericles' oration on the eve of the Peloponnesian War. This has been roughly translated as "Great is the country that controls the sea". The Hellenic Navy's emblem consists of an anchor in front of a crossed Christian cross and trident, with the cross symbolizing Greek Orthodoxy, and the trident symbolizing Poseidon, the god of the sea in Greek mythology. Pericles' words are written across the top of the emblem. "The navy, as it represents a necessary weapon for Greece, should only be created for war and aim to victory."...............The Hellenic Merchant Marine refers to the Merchant Marine of Greece, engaged in commerce and transportation of goods and services universally. It consists of the merchant vessels owned by Greek civilians, flying either the Greek flag or a flag of convenience. Greece is a maritime nation by tradition, as shipping is arguably the oldest form of occupation of the Greeks and a key element of Greek economic activity since the ancient times. Nowadays, Greece has the largest merchant fleet in the world, which is the second largest contributor to the national economy after tourism and forms the backbone of world shipping. The Greek fleet flies a variety of flags, however some Greek shipowners gradually return to Greece following the changes to the legislative framework governing their operations and the improvement of infrastructure.Blogger Tips and Tricks
This is a bilingual blog in English and / or Greek and you can translate any post to any language by pressing on the appropriate flag....Note that there is provided below a scrolling text with the 30 recent posts...Αυτό είναι ένα δίγλωσσο blog στα Αγγλικά η/και στα Ελληνικά και μπορείτε να μεταφράσετε οποιοδήποτε ποστ σε οποιαδήποτε γλώσσα κάνοντας κλικ στη σχετική σημαία. Σημειωτέον ότι παρακάτω παρέχεται και ένα κινούμενο κείμενο με τα 30 πρόσφατα ποστς....This is a bilingual blog in English and / or Greek and you can translate any post to any language by pressing on the appropriate flag....Note that there is provided below a scrolling text with the 30 recent posts...Αυτό είναι ένα δίγλωσσο blog στα Αγγλικά η/και στα Ελληνικά και μπορείτε να μεταφράσετε οποιοδήποτε ποστ σε οποιαδήποτε γλώσσα κάνοντας κλικ στη σχετική σημαία. Σημειωτέον ότι παρακάτω παρέχεται και ένα κινούμενο κείμενο με τα 30 πρόσφατα ποστς.........

Friday, July 17, 2009

NASA : The Casie Mission [ 238 ]

Posted on Jul 16, 2009 09:47:10 AM | Matthew Fladeland
The CASIE team includes participants from three NASA centers (ARC, GSFC, and JPL), the University of Colorado Boulder Brigham Young University, Fort Hays State University, and the National Center for Atmospheric Research.




Team members from NASA Ames Research Center developed a mission planning tool using Google Earth. The tool allows team members in Svalbard to view near-real time satellite data, weather data, and miscellaneous data. It also allows team members not deployed to Svalbard to monitor flights as they occur.
The CASIE team uses MODIS, QuikSCAT, and AMSR-E data displayed in Google Earth as ground overlays for flight planning. The MODIS Rapid Response System at Goddard Space Flight Center collects and generates images from the MODIS sensors onboard the Terra and Aqua satellites. The images include two true color images (one from each satellite) and a false color image from Terra. These data are converted for display in Google Earth, and they provide cloud information to the flight planners. The QuikSCAT and AMSR-E satellite data provide information on ice location and concentration, which allows the flight planners to locate target areas for data collection.


The planners also have sounding data, icing and snow cover forecasts, cloud pressure, perceptible water, and surface temperature data available to complement the ground overlays. This mission planning system also allows the CASIE team to view SIERRA’s flight track during a mission.
While in flight, SIERRA sends position, temperature, and humidity data to the base station Ny-Alesund. These data are displayed in different ways within Google Earth. NASA computers generate a flight path in Google Earth from SIERRA’s position data. We display the temperature and humidity data as an x-y plot within the Google Earth user interface, and the data provide information on potential icing on the aircraft.

The combination of satellite data, forecasts, and real-time data from the aircraft allows for multiple participants across the country to participate in the CASIE mission without being deployed to Svalbard. You, too, can participate by opening this casie.kml file in Google Earth.

Posted by Jeremey Kerr, CASIE Mission Tracker lead
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