Colored Coulds

You may know the atmosphere can be divided into several layers. What is the furthest layer from here? Yes, it's the ionosphere. This layer plays an important role for radio communication. The molecules in the layer are ionized by the radiation from the Sun. These ionized molecules reflect radio waves from the ground. (of course, such waves with higher frequency can go through the layer though...) That is, we can send radio waves beyond the horizon. But this layer changes dynamically. So it is important to understand the phenomena and mechanism of it.

This picture is the experiment to observe winds in the ionosphere. The equipment of the rocket released the vapor of lithium. The flame color of lithium is red, so you can see a red clound in the image. It seems there are some other types of metal released. The scientists can figure out the dynamics of the ionosphere by analysing the transition of these clouds.

You can see the details about the experiment here.
http://www.nasa.gov/multimedia/imagegallery/image_feature_2504.html

C++/CLI (handmade) template for Windows Form Application

Finally, Microsoft released Visual Studio Express 2012, and it has IntelliSense for C++/CLI! If you have ever used Visual C++ 2010 Express, you might have complained about the absence of IntelliSense in it. So you don't need to use VC++ 2008 anymore.

But, unfortunately, there is no C++/CLI template for Windows Form Application as of Sept. 25th 2012.

So I made a template. I just put a form into an empty project and set it up as a Windows form application. So I might have missed some settings. Maybe you might do a better job.
Anyway, you can download it from this page of my web site.
http://sites.google.com/site/somedayuniverse/contents/c-cli-template-of-windows-form-application-in-visual-studio-express-2012

Practice for MATLAB

Recently, I need to use MATLAB for some reasons. I have never used this software, so I have to practice for it. However, you know MATLAB is extremely expensive enough to buy a good PC. This means that I cannot practice at home.

But I found a similar software, Octave. I heard its language is similar to MATLAB. I am not sure it is true. I will just try it to make sure.

Mars Eploration

I am recently excited about Mars exploration, especially Curiosity rover. You might have known that this spacecraft landed by using incredible techniques.

The previous rovers, such as Mars Exploration Rovers, used airbags and bounced on the ground several times to land on Mars. However, Curiosity used different process. After deploying its parachute and slowing down correctly, it separated from the parachute facilities and fell down with the special machine called Sky Crane. The crane hovered and hanged the rover with a cable. When the rover touched down, it flied away with the cable.

The processes are explained on this page: http://marsprogram.jpl.nasa.gov/msl/news/whatsnew/index.cfm?FuseAction=ShowNews&NewsID=1300

This achievement was made also by the spacecrafts orbiting Mars. Mars Odyssey helped the communication between Earth and Curiosity at the entry and descending.
http://mars.jpl.nasa.gov/odyssey/news/whatsnew/index.cfm?FuseAction=ShowNews&NewsID=1265
Mars Reconnaissance Orbiter are gathering data around the rover.
http://marsprogram.jpl.nasa.gov/msl/news/whatsnew/index.cfm?FuseAction=ShowNews&NewsID=1297

I think spacecrafts orbiting an celestial object are important to make the environment for exploration because they can establish the network around the object and Earth.
Even in deep space where a rover has to work by itself without the control room, if there are orbiters, they can seize the information of wide areas of an object.
In the future, it may be a major way to send a rover with many orbiters and machines scattering around an object rather than sending just a single rover or spacecraft.

Mental Calculation for Temperature Scales

Today, I heard the first cry of cicadas. It's summer! And It is very hot. The maximum temperature is 30 deg. Celsius. But how do you say it in Fahrenheit?
I am sometimes confused with the two scales of temperature: Fahrenheit and Celsius.


You know Fahrenheit is used in a few countries including the U.S. I don't know why Fahrenheit is still commonly used in the U.S. even though many other countries use Celsius. Every time I talk about weather with them, I have to "translate" Celsius to Fahrenheit, and vice versa.

But it is ridiculous to always hold a pen and notes (or a calculator) to use this formula: (F=C*9/5+32). So I have several steps to easily calculate scales in my head.

Celsius to Fahrenheit:
You have a value C in Celsius.

1. Double C
       C * 2
2. Subtract 10% of it
       2C - 0.1 * 2C
3. Add 32
       2C - 0.1 * 2C + 32

Then you get an exact value in Fahrenheit.

It is easier than expected.
For example, let's say the temperature is 30 deg. C.
So you can calculate as the below:
   30*2=60
   60-6=54
   54+32=86 The temperature is exactly 86 deg. F.

In case of 20 deg. C.:
   20*2=40
   40-4=36
   36+32=68 The temperature is 68 deg. F.

The reason can be derived from the formula.
F=C*9/5+32
=C*2/2*9/5+32
=C*2*(9/10)+32
=C*2*0.9+32
=C*2-C*2*0.1+32


Fahrenheit to Celsius:
You have a value F in Fahrenheit.

1. Divide F by 2
      F/2
2. Subtract 16 from it
      F/2 - 16
3. Add 10% of it
      F/2-16 + 0.1 * (F/2-16)

In this case, you get an approximately value in Celsius.

For example, let's say the temperature is 70 deg. F.
So you can calculate as the below:
   70/2=35
   35-16=19
   19+1.9=20.9  The temperature is about 21 deg. C.

The reason can be derived from the formula.
C=(F-32)*5/9
=(F-32)/2*2*5/9
=(F/2-16)*10/9
=(F/2-16)*1.11111...
≒(F/2-16)*1.1

Private Space Mission to ISS!

At last, the age of private space mission completely has come!
The private space ship, called Dragon, will go to ISS. Although the date to launch was delayed, it is May 7. So it will be soon.
http://www.nasa.gov/exploration/commercial/cargo/spacex_launchpreview.html

Docking to another spacecraft needs very complicated and difficult techniques. That's the reason why old spacecrafts were mainly controlled by dexterous military pilots. This means the private mission has been developed as well as those administered by governments. In addition, it will show the potentiality of private companies to send spacecrafts to more distant places.

Projected Glaxy

I found this beautiful picture. It is the panorama of the Milky Way.

Credit: ESO/S. Brunier

Yes, it is very beautiful. In addition, I found its projection is equirectangular or plate carree. So I can change this image into equidistant projection using my application!


I felt as if I were in space!