The serial card to support the T1 frame relay has been installed in the HP Cisco.
We encountered more problems with the fiber connection between HP and the visitor station. SMA is getting more equipment to help us resolve the problem.
The college of Tropical Agriculture at Komohana has been connected to the MKOCN through CSO using a pair of antennae set up at CTAHR-Komohana and the CSO Hilo facility. A Cisco catalyst 2912 switch is installed at CSO which provides connection to the Internet DS3s for both CSO and CTAHR-Komohana.
There was some discussion as to whether or not it is worthwhile to keep the frame relay as a backup. To find out how well the backup works, a decision was made to have a test before the next quarterly meeting. During this test the two DS3s that provide Internet service to the observatories will be yanked in some order to see if network traffic is automatically rerouted to the backup link. It was also pointed out that such a test will best be performed on a Tuesday, Wednesday, or Thursday. Pui Hin will send email to coordinate such a test.
Martin Houde of the of the CSO presented the viewpoint of CSO at the meeting. Subsequently, Martin sent me a summary of his presentation:
"1- The proposed wireless system would have a transmitting power of 30 mW at a frequency of 2.4 GHz and although these numbers might at first look appear harmless for telescopes operating in the mm/submm range, they are not. Indeed, taking into account the fact that radio observatories routinely try to detect signal which are on the order of a mJ (milli-Jansky), i.e., more than 20 orders of magnitude weaker than the proposed transmitter's power, it is easy to see that even a far harmonic from the wireless spectrum could, under the right conditions, totally contaminate the frequency bandwidths in the mm/submm range.
"2- The IF of the receivers used on Mauna Kea are or will soon be at frequencies that will directly be in the range of the fundamental or first harmonics of the proposed transmitter. This might be the most direct and obvious threat.
"3- Once installed, the proposed wireless would certainly grow in time and every computer (or other equipment) connected to it is likely to increase the amount of "noise" in the mm/submm wavelengths range. It, therefore, becomes clear that any test done now on the amount of pollution brought about by such system cannot be a guarantee for the future. This is especially true when one takes into account the fact the receivers used by the radio observatories are getting more and more sensitive as time goes by.
"These are the main reasons why the CSO would not agree, under any conditions, to the implementation of a wireless system on Mauna Kea. We believe that it is highly desirable that we stand by the existing rule, agreed to by the directors of the observatories, to not allow the operation of such a system.
"Finally, I would like to stress the fact that astronomers have for a long time fought the adverse effects of light pollution (for visible astronomy) and other undesirable signals (especially in radio astronomy at longer wavelengths) that hinder their abilities to detect faint signals from astronomical sources. But fortunately, it appears that the submm range stands a good chance of remaining in its actual pristine state. It would, therefore, be a very sad statement if we, the users of one of the best astronomy site on the planet, were to take actions that would go against our own interests and show the rest of the world what should not be done."
Thomas Cooper of SMA told us that SMA is also preparing a formal response.
Jonathan Chock indicated that equipment such as cell phones and walkie talkies are already used on the summit. He said it would be useful if the submillimeter and radio telescopes can come up with guidelines including a list of equipment that should not be used around the summit.
SMA and CSO agreed to work on such a list.
Here are a couple points of interest: