Month: March 2009

Space Shuttle Update

Space shuttle Discovery is about 3 hours away from their de-orbit burn for an expected landing of (17:39 UTC). NASA are about to start their go/no-go poll to close the payload bay doors.

Posted in Astronomy

Image Editing in C# – Contrast

When attempting to get machines to process images you sometimes run into noise problems. Filters are regularly applied first to clean them up. Editing the contrast of an image changes its dynamic range. In its most basic form, it will

Posted in C# Tips

Comments now require a CAPTCHA to be completed

I’ve been getting around 200 spam comments a day on this site and had to manually sort through them to find the non spam comments. This morning I was finally fed up with comment spam on this site and decided

Posted in General Randomness

Image Editing in C# – Greyscale

I’m in the process of writing some code to detect the stars in astromical images. One of the filters I need to apply to an image is to convert it to greyscale. Conversion to greyscale is relatively straightforward – The

Posted in C# Tips

More debris on it's way to the space station

While the shuttle is on it’s way to the station, more debris is inbound. NASA are deciding what to do. They may boost the station up a bit which will mean that the shuttle will get there a day later.

Posted in Astronomy, General Randomness

TLES – First Time Derivative of the Mean Motion

This post is part of a series on understanding the meaning behind the values contained in a Two Line Element set, or Keplerian Elements. The main article is here. First Time Derivative of the Mean Motion Engineers like to use

Posted in Astronomy

TLEs – Epoch Year and Day

This post is part of a series on understanding the meaning behind the values contained in a Two Line Element set, or Keplerian Elements. The main article is here. Epoch Year and Day The epoch is simply the point in

Posted in Astronomy

Space shuttle still on track for a launch in 30 minutes

Space Shuttle discovery is still on track for a launch at 11:43pm UTC. Weather is perfect and everything looks good. There is a sleeping bat attached to the external fuel tank however “The bat is not expected to interfere with

Posted in Astronomy

Space Shuttle STS-119 still go for a Sunday Launch

After fixing a problem with leaking fuel, Space Shuttle Discovery is still go for Launch on Sunday the 15th March. Launch time is expected to be 23:43 UTC (Which is 19:43 EDT, or 12:43 Monday NZDT). More information is available

Posted in Astronomy

TLEs – Calculation of the Julian Day Number (JDN)

This post is part of a series on understanding the meaning behind the values contained in a Two Line Element set, or Keplerian Elements. The main article is here. Calculation of the Julian Day Number (JDN) Julian day numbers are

Posted in Astronomy, C# Tips