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[] More on bin Laden's radio communications system, clarifications,


hier eine (von Geert Lovink) weitergeleitete Nachricht
zu OBL Kommunikationssystemen



 > Previous message:
 > "Details on bin Laden's radio communications system"
 > ---
 > there are several technical inaccuracies and no real information about "
 > bin Laden's radio communications system" in the information you were sent
 > and forwarded to the list.  in the interest of promulgating accurate
 > information, please note the following:
 > there is no such thing as a "high power HF SSB handset."  any handheld
 > would necessarily be low power (5 Watts or less) or it would drain the
 > batteries in a few seconds or minutes.
 > CODAN HF radios are not addressable, although they can be optionally
 > equipped to be and used in that manner a user-selectable basis.  in nearly
 > all cases, HF (high-frequency, 3-30mhz) radios are not like cellular
 > or network interface cards which do transmit unique identifiers along with
 > their signals.
 > it is laughable to assume that afghans, taleban, or others using radios
 > stolen from UN personnel would use UN callsigns, or bother with using
 > callsigns at all.  they might use some code names to differentiate
 > themselves, but certainly not UN callsigns.  if they wanted to try to
 > confuse listeners, they could use any two-way radios and callsigns they
 > wanted to.
 > HF radios with voice encryption are readily available on the commercial
 > market from two-way companies like motorola, racal, etc.  it's a question
 > of bandwidth: if you're only using a 5khz voice channel it's not possible,
 > but if you're using wider bandwidth spread-spectrum HF, then it is
 > and often used by US military.  it's not likely the taleban uses these,
 > it's a certainty the u.s. military there is.
 > 5-bit "Baudot" code (more properly called Moore coding) was once popular
 > for low data rate radioteletype (RTTY) data over HF channels, but it's
 > rarely used anymore.
 > the two-way radio held by usama bin laden (seen in that frequently
 > rebroadcast archive video) is a VHF transceiver that operates somewhere in
 > the 30-300mhz range.  other handheld radios used by the taleban and
 > "northern alliance" include those that operate somewhere in the 300-500mhz
 > UHF spectrum.
 > it's certainty that u.s. forces have sophisticated radio direction-finding
 > equipment in several locations in afghanistan that scan and record all
 > radio activity in the region, including bearing (direction) data.  this
 > gathered data is shared and triangulated for intelligence and targeting
 > purposes:
 > in addition to SIGINT from radio transmissions, US military has probably
 > dropped thousands of small, ground-based sensors that detect and transmit
 > vibration, noise, temperature and other data.  some of these are very
 > sophisticated and network with each other.  some even use small lasers to
 > transmit signals between each other and to ground, air, or space-based
 > collection stations:
 > -ed

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