
Monday, May 12, 2008
It's no secret that I am really pissed off about fees -- from ATMs to telephone bills, we are charged enormous amounts of money just cents at a time; far more than is proper in most cases, just because they can. Why do we continue to pay without protest?A University of Leicester space scientist has worked out that sending texts via mobile phones works out to be far more expensive than downloading data from the Hubble Space Telescope.
He worked out the cost of obtaining a megabyte of data from Hubble and compared that with the 5p cost of sending a text.
He said: The bottom line is texting is at least 4 times more expensive than transmitting data from Hubble, and is likely to be substantially more than that.
The maximum size for a text message is 160 characters, which takes 140 bytes because there are only 7 bits per character in the text messaging system, and we assume the average price for a text message is 5p. There are 1,048,576 bytes in a megabyte, so that's 1 million/140 = 7490 text messages to transmit one megabyte. At 5p each, that's £374.49 per MB - or about 4.4 times more expensive than the most pessimistic estimate for Hubble Space Telescope transmission costs.
Dr Bannister said it had been difficult to work out exactly how much Hubble data transmission costs. So he contacted NASA who gave him a firm figure of £8.85 [$17.35] per megabyte (MB) for the transmission of data from HST to the Earth.
This doesn't include the cost of the ground stations and the time of the personnel along the way, but it is an unambiguous number for that part of the process. So that's £8.85 to get each MB from Hubble, to the first point of contact on the ground, but no further. Hence we need to go a little bit further to estimate exactly how much it costs to transmit data from Hubble to the end user - i.e. to the data archive which scientists can access. This is difficult, so I had to make some conservative assumptions.
Dr Bannister estimated the cost of the data from Hubble could vary between £8.85 and £85 per MB- much cheaper than the £374.49 per MB cost of transmitting one MB of text.
Things I’m working on
My friends Jann, Mike and I have created an app for iPad, iPhone and iPod: an interactive Disneyland map.
The seventh annual DC Shorts Film Festival will take place September 9-16 in Washington, DC. Learn more about the Fest at dcshorts.com.
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