Las Vegas renumbered this year, Seattle has renumbered recently, its a regular thing. depending on where you are the magnetic variation can easily shift 0.5-1.0 deg / year. Usually the runway renumber happens when the mag heading shifts across the 5 deg boundary. most runways are built on ordinal true headings that are then converted to the nearest 10 deg magnetic equivalent for numbering. my local example is DEN - rwys 7/25 and 8/26 are currently both 82.1 mag with 8.4E mag var or 90 true. the mag var in DEN is changing 0.1 deg/yr W ( it was 9.6E in 2005 ).
https://maps.ngdc.noaa.gov/vie... lets you look at the mag var over history
Contractors are preferred because when the contract is over the workers are not still on the government payroll. If they hire workers directly they would be covered by the civil service rules and be effectively employed for life no matter how bad they were. This shows up all the time when there is a need to change or slow down a program the contractors are in the news because of large layoffs.
look at the Gilderfluke (https://www.gilderfluke.com) playback systems. they are designed for this type of application. the SD-10 may be enough if your requirements are simple enough or the SD-25 can handle almost any requirement. designed to run on 12-24 V power , use SD cards for storage, 2 external switch inputs, line level audio outs.
I just looked in the Denver Area using the Spaectrum Bridge system, there is 1 white space frequency available for use, all the others are already blocked by existing TV usage. that single 6Mhz slot means that at least in the denver city area trying to make use of "White Space" for networking is basically useless. I would like to see a map of the US with the number of channels available per 10 sq. miles plotted across the country. I'm guessing that there will be lots of bandwidth available where there are low population densities and little bandwidth available where most of the population is located.
.
there are no more NDB stations left in the USA and the FAA is working on turning off the VOR stations as soon as they finally get the WAAS GPS based nexgen navigation system working. The whole idea of the Nexgen Navigation system is to stop flying on airways defined by VORs and move to flying directly from point to point navigating by GPS only.. i predict a huge fight between the FAA and the FCC
actually the devices mush check the database at least daily, the TV station part is mostly unchanging, but the database also includes wireless mic users that are protected and those listing update daily. To be legal the TVBD must check the database for "today's" allowable frequencies. If the database can't be checked the TVBD must shut down till it can get a update from the database. see: http://www.fcc.gov/Daily_Releases/Daily_Business/2010/db0924/FCC-10-174A1.pdf pg 41
there is no "space" between the channels, each TV channel is 6 MHz and with digital TV uses all of the allocated 6MHz. the FCC allocates every other channel in a market, but the TVBD rules do not allow the use of the "empty" channel next to any allocated TV transmitter. In the major markets the "empty" channels are all allocated to stations in the next near by citys. you can look at the northeast coast area( BOS-DCA), the upper mid west(MKE-CHI), San Fran, Los Angeles,... there is a broadcaster allocated on every channel from 7-51 in those areas which means within 50-70 miles of those citys TVBDs will be completely blocked from operating or if you are lucky ther might be 1 or 2 6 MHz channels to share with 1M other users
There are no "buffer" bands, analog TV used 2 carriers in the 6MHz channel and you could find some free space as long as you didn't mind the interference with either the audio or video. DTV uses all of the 6 MHz with almost no channel edge gap and is spread spectrum like wifi so there are no gaps to sneak into. In the major metropolitan areas the reality is there will be NO free channels for TVBDs. Which means that a lagre percentage of the US population will gain no benefit form the TVBD devices because they will have no channels to use them on.
At this point no one is making 400-700 Mhz hardware, and the required database for the fixed stations is not designed, much less in operation. Google and others have a working group that is working on a design spec for the database but they are not done and the FCC has not indicated if they will use the spec that Google etal come up with. Once a spec is approved then the database system has to be created and deployed before the first stations can be sold. I expect it will be 6 mo. to a year till the pieces are all in place to start the testing and manufacturing of white space networking hardware
Every station was given a second frequency and could chose what to do with it in the long run. The answer is to contact your local stations and ask what their situation is. You can check the FCC license database which will show 2 DTV licenses for those stations that will switch from a temporary low power system to a permanent high power system.
one problem right now is many DTV signals are not being transmitted at their final full power because they are being sent from temporary transmitters and in many cases on different frequencies than then their final assignment. the stations will switch transmitters and frequencies when the switchover is made.So looking at DTV today does not necessarily tell what the signal will look like after the changeover.
just to give you an idea, here is the applicable FAA reg for crew scheduling, and the pilots contract may have additional terms that must be met.
121.471 Flight time limitations and rest requirements: All flight crewmembers. top
(a) No certificate holder conducting domestic operations may schedule any flight crewmember and no flight crewmember may accept an assignment for flight time in scheduled air transportation or in other commercial flying if that crewmember's total flight time in all commercial flying will exceed--
(1) 1,000 hours in any calendar year;
(2) 100 hours in any calendar month;
(3) 30 hours in any 7 consecutive days;
(4) 8 hours between required rest periods.
(b) Except as provided in paragraph (c) of this section, no certificate holder conducting domestic operations may schedule a flight crewmember and no flight crewmember may accept an assignment for flight time during the 24 consecutive hours preceding the scheduled completion of any flight segment without a scheduled rest period during that 24 hours of at least the following:
(1) 9 consecutive hours of rest for less than 8 hours of scheduled flight time.
(2) 10 consecutive hours of rest for 8 or more but less than 9 hours of scheduled flight time.
(3) 11 consecutive hours of rest for 9 or more hours of scheduled flight time.
(c) A certificate holder may schedule a flight crewmember for less than the rest required in paragraph (b) of this section or may reduce a scheduled rest under the following conditions:
(1) A rest required under paragraph (b)(1) of this section may be scheduled for or reduced to a minimum of 8 hours if the flight crewmember is given a rest period of at least 10 hours that must begin no later than 24 hours after the commencement of the reduced rest period.
(2) A rest required under paragraph (b)(2) of this section may be scheduled for or reduced to a minimum of 8 hours if the flight crewmember is given a rest period of at least 11 hours that must begin no later than 24 hours after the commencement of the reduced rest period.
(3) A rest required under paragraph (b)(3) of this section may be scheduled for or reduced to a minimum of 9 hours if the flight crewmember is given a rest period of at least 12 hours that must begin no later than 24 hours after the commencement of the reduced rest period.
(4) No certificate holder may assign, nor may any flight crewmember perform any flight time with the certificate holder unless the flight crewmember has had at least the minimum rest required under this paragraph.
(d) Each certificate holder conducting domestic operations shall relieve each flight crewmember engaged in scheduled air transportation from all further duty for at least 24 consecutive hours during any 7 consecutive days.
(e) No certificate holder conducting domestic operations may assign any flight crewmember and no flight crewmember may accept assignment to any duty with the air carrier during any required rest period.
(f) Time spent in transportation, not local in character, that a certificate holder requires of a flight crewmember and provides to transport the crewmember to an airport at which he is to serve on a flight as a crewmember, or from an airport at which he was relieved from duty to return to his home station, is not considered part of a rest period.
(g) A flight crewmember is not considered to be scheduled for flight time in excess of flight time limitations if the flights to which he is assigned are scheduled and normally terminate within the limitations, but due to circumstances beyond the control of the certificate holder (such as adverse weather conditions), are not at the time of departure expected to reach their destination within the scheduled time.
the map data is available from the USGS for free:
http://www.usgs.gov/pubprod/digitaldata.html
you are looking for the DLG/SDTS datasets
to view and edit you need a GIS package:
http://mcmcweb.er.usgs.gov/drc/dlgv32pro/
is a simple win32 viewer from USGS
GRASS/GIS http://grass.itc.it/index.html
is a common cross platform full featured GIS system ( pretty steep learning curve)
The race course will be differrent next time. thats a large part of the concept , 2 hours before the start the teams are given 1000 GPS waypoints that define the perimeter of the course. The vehicles have to follow the course _and_ stay inside the perimeter - Which is why many of the bots were paused at various times - The width of the course where another bot was stalled was too narrow to allow others to pass
As one of the mozilla SVG developers I find it a bit funny that a user creating a freshmeat site to stash their copy of a mozilla svg build is slashdot news. there are daily win32 builds ( from both the trunk and branch SVG trees) posted to ftp.mozilla.org and about monthly linux ( RH7.1) tar.gz. and have been since mozilla 1.0
There is still no agreement to make SVG part of the base GRE install, the current effort is to re-merge the SVG devel branch back to the trunk
Except those are _not_ ports of mozilla, they are native browsers build ontop of the gecko rendering engine. gecko is the basic html renderer under mozilla, it doesn't do javascript, plugins, mail/news, prefs, or any of the rest of the stuff that makes a browser
dave
Re:How does a PDP-10 looks like?
on
PDP-10 Revival
·
· Score: 1
the Decsystem 10 CPU (KL10 model) was a 6ft high blue cabinet 6ft wide an about 30" deep containing a 19" wide section that had the pdp-11-45 frontend/console machine and a 48" wide section that held the CPU/IO/MEM inteerface cards ( DEC hex height cards) topped b4 10" fans and an air duct that vented out the top front of the cabinet
memory/diskcontrollers/tape controllers/asyncIO(more PDP-11/45) controllers were all in additional 6 foot high blue cabinets
M17 is on the mozilla site, lok under nightly builds, M17 was branched from the tree last week and is getting final bug fix patches, the current tree is M18 ( pre-M18 ) and is even faster than the M17 branch , which is faster than M16
try downloading a nightly M17 ( and or M18 ) build they are all better than M16
try the new 'classic" theme (edit/preferences/themes)
they won't beconne space debris, they are LEO sats.
Low Earth Orbit Sats can't stay in orbit without constant fuel burns to lift the orbit, so within 5 or so years every Iridium sat.will run out of fuel and drop into the atmosphere.
Better to de-orbit them in a controlled manner than let them run out of fuel and re-enter randomly
Slashdot Mirror
charts are updated every 14 days , nav databases are updated ever 28 days , you are responsible to have current charts and data
Las Vegas renumbered this year, Seattle has renumbered recently, its a regular thing. depending on where you are the magnetic variation can easily shift 0.5-1.0 deg / year. Usually the runway renumber happens when the mag heading shifts across the 5 deg boundary. most runways are built on ordinal true headings that are then converted to the nearest 10 deg magnetic equivalent for numbering. my local example is DEN - rwys 7/25 and 8/26 are currently both 82.1 mag with 8.4E mag var or 90 true. the mag var in DEN is changing 0.1 deg/yr W ( it was 9.6E in 2005 ). https://maps.ngdc.noaa.gov/vie... lets you look at the mag var over history
total loss of electrical power is the main reason - lose your generators and you have a limited time on battery only
here's one i found only the video processor is not defined linux/win I7 processor http://www.drs-ts.com/pdf/JV5%...
the third looks to have slid down the embankment but stopped short of the water
Contractors are preferred because when the contract is over the workers are not still on the government payroll. If they hire workers directly they would be covered by the civil service rules and be effectively employed for life no matter how bad they were. This shows up all the time when there is a need to change or slow down a program the contractors are in the news because of large layoffs.
look at the Gilderfluke (https://www.gilderfluke.com) playback systems. they are designed for this type of application. the SD-10 may be enough if your requirements are simple enough or the SD-25 can handle almost any requirement. designed to run on 12-24 V power , use SD cards for storage, 2 external switch inputs, line level audio outs.
I just looked in the Denver Area using the Spaectrum Bridge system, there is 1 white space frequency available for use, all the others are already blocked by existing TV usage. that single 6Mhz slot means that at least in the denver city area trying to make use of "White Space" for networking is basically useless. I would like to see a map of the US with the number of channels available per 10 sq. miles plotted across the country. I'm guessing that there will be lots of bandwidth available where there are low population densities and little bandwidth available where most of the population is located. .
there are no more NDB stations left in the USA and the FAA is working on turning off the VOR stations as soon as they finally get the WAAS GPS based nexgen navigation system working. The whole idea of the Nexgen Navigation system is to stop flying on airways defined by VORs and move to flying directly from point to point navigating by GPS only.. i predict a huge fight between the FAA and the FCC
actually the devices mush check the database at least daily, the TV station part is mostly unchanging, but the database also includes wireless mic users that are protected and those listing update daily. To be legal the TVBD must check the database for "today's" allowable frequencies. If the database can't be checked the TVBD must shut down till it can get a update from the database. see: http://www.fcc.gov/Daily_Releases/Daily_Business/2010/db0924/FCC-10-174A1.pdf pg 41
there is no "space" between the channels, each TV channel is 6 MHz and with digital TV uses all of the allocated 6MHz. the FCC allocates every other channel in a market, but the TVBD rules do not allow the use of the "empty" channel next to any allocated TV transmitter. In the major markets the "empty" channels are all allocated to stations in the next near by citys. you can look at the northeast coast area( BOS-DCA), the upper mid west(MKE-CHI), San Fran, Los Angeles, ... there is a broadcaster allocated on every channel from 7-51 in those areas which means within 50-70 miles of those citys TVBDs will be completely blocked from operating or if you are lucky ther might be 1 or 2 6 MHz channels to share with 1M other users
There are no "buffer" bands, analog TV used 2 carriers in the 6MHz channel and you could find some free space as long as you didn't mind the interference with either the audio or video. DTV uses all of the 6 MHz with almost no channel edge gap and is spread spectrum like wifi so there are no gaps to sneak into. In the major metropolitan areas the reality is there will be NO free channels for TVBDs. Which means that a lagre percentage of the US population will gain no benefit form the TVBD devices because they will have no channels to use them on.
At this point no one is making 400-700 Mhz hardware, and the required database for the fixed stations is not designed, much less in operation. Google and others have a working group that is working on a design spec for the database but they are not done and the FCC has not indicated if they will use the spec that Google etal come up with. Once a spec is approved then the database system has to be created and deployed before the first stations can be sold. I expect it will be 6 mo. to a year till the pieces are all in place to start the testing and manufacturing of white space networking hardware
Philly and Baltimore 2 ->38 3 ->26 6 stays 10->34 11 stays 12 stays 13 stays 17 stays 35 stays 45 ->46 57 ->32 60 ->9 (yes 9) 61 ->31 62 ->49 http://www.rabbitears.info/market.php
Every station was given a second frequency and could chose what to do with it in the long run. The answer is to contact your local stations and ask what their situation is. You can check the FCC license database which will show 2 DTV licenses for those stations that will switch from a temporary low power system to a permanent high power system.
one problem right now is many DTV signals are not being transmitted at their final full power because they are being sent from temporary transmitters and in many cases on different frequencies than then their final assignment. the stations will switch transmitters and frequencies when the switchover is made.So looking at DTV today does not necessarily tell what the signal will look like after the changeover.
http://www.andrew.com/products/measurement_sys/inv ex_system.aspx
is the info on the system they use to gather the data
just to give you an idea, here is the applicable FAA reg for crew scheduling, and the pilots contract may have additional terms that must be met.
121.471 Flight time limitations and rest requirements: All flight crewmembers.
top
(a) No certificate holder conducting domestic operations may schedule any flight crewmember and no flight crewmember may accept an assignment for flight time in scheduled air transportation or in other commercial flying if that crewmember's total flight time in all commercial flying will exceed--
(1) 1,000 hours in any calendar year;
(2) 100 hours in any calendar month;
(3) 30 hours in any 7 consecutive days;
(4) 8 hours between required rest periods.
(b) Except as provided in paragraph (c) of this section, no certificate holder conducting domestic operations may schedule a flight crewmember and no flight crewmember may accept an assignment for flight time during the 24 consecutive hours preceding the scheduled completion of any flight segment without a scheduled rest period during that 24 hours of at least the following:
(1) 9 consecutive hours of rest for less than 8 hours of scheduled flight time.
(2) 10 consecutive hours of rest for 8 or more but less than 9 hours of scheduled flight time.
(3) 11 consecutive hours of rest for 9 or more hours of scheduled flight time.
(c) A certificate holder may schedule a flight crewmember for less than the rest required in paragraph (b) of this section or may reduce a scheduled rest under the following conditions:
(1) A rest required under paragraph (b)(1) of this section may be scheduled for or reduced to a minimum of 8 hours if the flight crewmember is given a rest period of at least 10 hours that must begin no later than 24 hours after the commencement of the reduced rest period.
(2) A rest required under paragraph (b)(2) of this section may be scheduled for or reduced to a minimum of 8 hours if the flight crewmember is given a rest period of at least 11 hours that must begin no later than 24 hours after the commencement of the reduced rest period.
(3) A rest required under paragraph (b)(3) of this section may be scheduled for or reduced to a minimum of 9 hours if the flight crewmember is given a rest period of at least 12 hours that must begin no later than 24 hours after the commencement of the reduced rest period.
(4) No certificate holder may assign, nor may any flight crewmember perform any flight time with the certificate holder unless the flight crewmember has had at least the minimum rest required under this paragraph.
(d) Each certificate holder conducting domestic operations shall relieve each flight crewmember engaged in scheduled air transportation from all further duty for at least 24 consecutive hours during any 7 consecutive days.
(e) No certificate holder conducting domestic operations may assign any flight crewmember and no flight crewmember may accept assignment to any duty with the air carrier during any required rest period.
(f) Time spent in transportation, not local in character, that a certificate holder requires of a flight crewmember and provides to transport the crewmember to an airport at which he is to serve on a flight as a crewmember, or from an airport at which he was relieved from duty to return to his home station, is not considered part of a rest period.
(g) A flight crewmember is not considered to be scheduled for flight time in excess of flight time limitations if the flights to which he is assigned are scheduled and normally terminate within the limitations, but due to circumstances beyond the control of the certificate holder (such as adverse weather conditions), are not at the time of departure expected to reach their destination within the scheduled time.
the map data is available from the USGS for free: http://www.usgs.gov/pubprod/digitaldata.html you are looking for the DLG/SDTS datasets to view and edit you need a GIS package: http://mcmcweb.er.usgs.gov/drc/dlgv32pro/ is a simple win32 viewer from USGS GRASS/GIS http://grass.itc.it/index.html is a common cross platform full featured GIS system ( pretty steep learning curve)
>
The race course will be differrent next time. thats a large part of the concept , 2 hours before the start the teams are given 1000 GPS waypoints that define the perimeter of the course. The vehicles have to follow the course _and_ stay inside the perimeter - Which is why many of the bots were paused at various times - The width of the course where another bot was stalled was too narrow to allow others to pass
As one of the mozilla SVG developers I find it a bit funny that a user creating a freshmeat site to stash their copy of a mozilla svg build is slashdot news. there are daily win32 builds ( from both the trunk and branch SVG trees) posted to ftp.mozilla.org and about monthly linux ( RH7.1) tar.gz. and have been since mozilla 1.0
There is still no agreement to make SVG part of the base GRE install, the current effort is to re-merge the SVG devel branch back to the trunk
dave
Except those are _not_ ports of mozilla, they are native browsers build ontop of the gecko rendering engine. gecko is the basic html renderer under mozilla, it doesn't do javascript, plugins, mail/news, prefs, or any of the rest of the stuff that makes a browser
dave
the Decsystem 10 CPU (KL10 model) was a 6ft high blue cabinet 6ft wide an about 30" deep containing a 19" wide section that had the pdp-11-45 frontend/console machine and a 48" wide section that held the CPU/IO/MEM inteerface cards ( DEC hex height cards) topped b4 10" fans and an air duct that vented out the top front of the cabinet
/asyncIO(more PDP-11/45) controllers were all in additional 6 foot high blue cabinets
memory/diskcontrollers/tape controllers
dave
old Decsystem 10/20 service engineer
M17 is on the mozilla site, lok under nightly builds, M17 was branched from the tree last week and is getting final bug fix patches, the current tree is M18 ( pre-M18 ) and is even faster than the M17 branch , which is faster than M16
try downloading a nightly M17 ( and or M18 ) build they are all better than M16
try the new 'classic" theme (edit/preferences/themes)
mozilla is really getting very good
they won't beconne space debris, they are LEO sats.
Low Earth Orbit Sats can't stay in orbit without constant fuel burns to lift the orbit, so within 5 or so years every Iridium sat.will run out of fuel and drop into the atmosphere.
Better to de-orbit them in a controlled manner than let them run out of fuel and re-enter randomly