Slashdot Mirror

← Back to Domains

Domain: danshistory.com

Stories and comments across the archive that link to danshistory.com.

Comments · 7

  1. Re:Russians using GPS by Dun+Malg · · Score: 1 · on First modernized GPS satellite Launched
    I would be very very very surprised if the Russians haven't been able to get their hands on a military GPS locator and picked it apart. Sure, the US can still turn it off but then it's lights out for everyone

    There's no advantage to having a military GPS receiver. They're not all that different from civilian receivers. It was assumed when they designed the system that "the enemy" would procure an example of the device at some point. This is why the military channels are protected by encryption. The guidance package off a JDAM (for example) is worth diddly squat once its encryption keys expire, and in a war zone, I guarantee those keys expire very quickly.

  2. Anti-satellite? by Johnboi+Waltune · · Score: 4, Interesting · on Laser Cannons Coming to an F-16 Near You
    Can it knock out a satellite?

    F-16 operating ceiling = 15.240 kilometers

    Minimum LEO satellite altitude = about 150 kilometers

    I couldn't find any information about the range of the HELLADS system; that information is probably classified. However, TFA claims there will be a 150 kilowatt version of the laser by 2007. Any laser experts know if that power of laser can take out a target 135 kilometers away? Is the idea even feasible?

  3. Re:That's more or less the idea by 10Ghz · · Score: 1 · on Net Addiction Gets Finnish Soldiers Out Of Army
    1. Stealth aicraft will be deplyed where they are most effective. They are not invisible to radar; _only harder to detect_.


    how many stealth-fighters does Russia have?

    2. Refer to your sources, so I can properly address the issue.


    For example:

    "On the fourth night of the air war, March 27, around 8:45 in the evening an F-117 was heading back to base after dropping at least one of its 2,000-pound, laser-guided bombs on a target near heavily defended Belgrade. Suddenly, with little or no warning, an SA-3 missile flying at three times the speed of sound and guided by an improvised network of Serbian radars, exploded in a blast of shell fragments a fewft from the plane, slamming it into an uncontrolled dive. The missile's 130 lb warhead is designed to detonate when it gets within 20 ft of its target. Stunned by the explosion, the pilot struggled against what he said approached pressure five times the force of gravity to yank the handles below his seat to eject from the crippled warplane."

    I never said I knew a group of people. I've made inqueries and detected reoccuring statements of alcoholism.


    Well whoop-de-fucking-do! Those take place in just about every military around the world! And alcoholism is pretty common in Finland so there are bound to be few problem-cases in the military as well.

    The people who go on peacekeeping missions are voulunteers, and not forced against their will like the majority of the military force.


    No-one is forced to serve in Finland. you can choose civil-service instead. Majority still choose regural service. And according to studies, overwhelming majority of Finns are prepared to defent the country if needed.

    In case of war, how long do you think the bulk of the fighting force would be trained? A week? - In one week Finland would be overrun.


    This may come as a shock to you, but wars don't "just happen". There would be advance-warning giving more than enough time to bring the troops up to speed.

    The people who go on peacekeeping operations are trained much longer


    Actually, they receive regural training in the Pori Brigade. the additional traning is only relevant for peace-keeping-missions (mob-control, applying of force etc.). They receive the actual combat-training during the regural-training.

    In return they get the Finnish BNP


    I assume you talk about GNP? Do you really assume that Russians could just annex Finland and Finlands GNP would then be added to Russias? It doesn't quite work that way, espesially not after a hostile invasion.

    natural resources


    yeah, Russians are really craving for those Finnish forests, wilderness, swamps and lakes.... Just about the only "natural resource" this country has is the people and their know-how. And those can't be controlled like you could control oil for example.

    You _can_ invade a country through air force, and unless you've been living under a rock you'd know it happened last time right after 9.11.2001.


    Is Al-Qaida in control of USA? No? That's what I thought.... to control the country, to INVADE it, you need troops.

    And how is Russia doing in Chechnya...?


    Like shit. And they are just facing some rebels running around with AK-47's and RPG's, not a modern army with modern equipment.
  4. Re:Unreplaced by Moofie · · Score: 1 · on Concorde to be Grounded

    Not Badger. Blackjack.

  5. why solid, and not liquid? by vortexau · · Score: 1 · on Amateur Rocket Heads Into Space

    I'm wondering why they've gone back to the old technology of Solid Fuel rocketry when 58 years ago Liquid Fuel rocketry was getting quite successful with the 'A-4'?

    .

  6. Sig by pompomtom · · Score: 1 · on Microsoft Shuts Auction Doors On Old Windows

    Why you'd better try harder!

  7. Radio - not a hope by dingbat_hp · · Score: 1 · on Robot Positioning Systems?

    Radio just isn't going to cut it for this. Simple and reliable 'bot positioning at this time needs an absolute position indicator. Open the box, place the 'bot on-site, boot it up for the very first time and it should be able to work out where it is. Anything that requires it to be placed in a "known position", then track movement from their is just too painful to contemplate.

    Doppler radio systems might deliver some velocity information (but it's difficult), but it cannot do absolute positioning.

    Radio multi-station phase-tracking systems were developed during WW2 (Gee, Oboe) to give absolute positions. The trouble with these is that they only work over long distances. They work by timing path length differences between fixed stations, so they can only work if the path lengths differ by more than the shortest time interval you can measure, multiplied by the speed of light. With radio wavelengths in a garden - forget it !