Five major international
broadcasters — Voice of America, British Broadcasting Corp., Deutsche Welle,
Audiovisuel Extérieur de la France and Radio Netherlands Worldwide — recently called
on Iran to stop jamming radio and TV signals targeted at that country.
“It has been going on
intermittently for at least two years,” says Jan Hoek, RNW’s director general.
“Stations affected have been VOA’s
Persian network, RFE/RL’s Radio Farda and Radio Sawa, the BBC’s Persian TV
channel and Deutsche Welle. On occasions, other stations such as RNW’s Dutch TV
channel and Radio Sawa (a U.S. Arabic-language station) that use subcarriers on
the same satellite transponder have been affected, even though they have no
broadcasts aimed at Iran.”
According to David Hartshorn,
secretary of the Global VSAT Forum, a satellite industry group: “Without
question, Iran’s jamming of satellite broadcasters has been on the rise, and
markedly so. This is due to the ‘Arab Spring’ domino effect and Iran’s concern
that the reform movement will take hold in Tehran and destabilize or, indeed,
upend the government.”
To stay ahead of the jamming, the
broadcasters have been hopping from one satellite to another.
“In fact, since June 2009, we have
changed satellites 10 times,” says Dave Shiben, head of the U.S. International
Broadcasting Bureau’s Satellite Engineering & Transmission department. IBB
is VOA’s parent organization.
“Because of the jamming that has
been aimed at our satellite channels, we’ve been kicked off some satellites and
told not to return.”
Jamming — transmitting radio waves
on the same channel as a broadcast, to destroy reception through destructive
interference — is nothing new. The Nazis jammed the BBC during World War II.
The Soviets jammed VOA and BBC during the Cold War.
Even today, jamming is a fact of
“We still have a lot of situations
where shortwave radio broadcasts are jammed by certain countries such as Cuba,
for example,” says Jeff White, general manager of U.S. commercial shortwave
station WRMI/Radio Miami International — which broadcasts to Cuba — and an
officer of the National Association of Shortwave Broadcasters.
Fortunately for WRMI and other
international broadcasters, “Shortwave is hard to jam effectively,” he said.
“The jammer’s effectiveness is usually limited to the local groundwave around
the jamming transmitter site. The same is true with jamming in Iran, China,
Ethiopia and other places where it’s taking place today.”
Unfortunately, the same is not true
for satellite jamming. If you uplink an interfering signal directly to the
satellite itself (uplink jamming) on the same channel as the one being
targeted, a nation can be blacked out.
Of course, this requires a lot of
power. This is why the Iranians also use “downlink jamming,” broadcasting
interfering signals at ground level, to disrupt satellite receivers.
According to the five international
broadcasters named earlier, Iran is jamming signals on a variety of satellites
operated by Eutelsat (France), Intelsat (U.S./Europe) and Arqiva (UK).
Ironically, the Iranian government
rents channels on these same satellites to deliver its own programming. Given
the corporate location of these carriers, one might expect their governments to
force them to retaliate against Iran. At the least, since Iran’s jamming causes
“collateral damage” to their other broadcast clients, perhaps the carriers
themselves would fight back.
Then again, maybe not.
“Governments cannot order private
companies, which most of them are, to stop carrying certain channels,” says Jan
Hoek. Further, “The satellite carriers know that if they refuse to carry
Iranian channels, a competitor will pick up the business, which is worth a lot
of money. The only way it would work would be if every satellite carrier signed
an agreement not to carry certain signals, but that’s never going to happen.”
Says Hadi Ghaemi, executive
director of International Campaign for Human Rights in Iran, “As a collective
trade group, all satellite carriers should be concerned about the precedent set
by (the) Iranian government’s extensive jamming and work together to bring an
end to it.
“Specific satellite carriers, like
Eutelsat, that provide broadcasting services both to the Iranian government as
well as the channels that it jams, have a much more serious responsibility. By
continuing to carry Iranian government broadcasts, they are effectively
accepting one of their clients (Iranian government) to harm and destroy the
products of their other clients. And that is nothing short of allowing Iranian
government getting away with jamming.”
What about fighting fire with fire
— say, with VOA jamming Iran’s satellite TV and terrestrial radio signals on a
“To do so would violate
international law,” said André Mendes, director of technology, services and
innovation at IBB. “We don’t do that.”
For its part, Eutelsat says it has
filed “multiple complaints” about Iranian jamming to “the relevant French and
international regulatory authorities” since May 2009, according to a Eutelsat statement
released in November 2011. As for taking unilateral action against the
Iranians? “We will not do anything about a channel if we do not get a clear
order backed by law,” said Eutelsat CEO Michel de Rosen in a December 2011
interview with the Wall Street Journal.
Ultimately, “It is the role of the
U.N. to address Iran’s actions,” says David Hartshorn. “But so far there has
been no forceful action undertaken.”
As a result, Iran can continue to
jam VOA, BBC and others with impunity. Thus a statement issued by the Big Five
broadcasters may seem hollow:
“We call upon the regulatory
authorities to take action against those who deliberately cause interference to
satellite signals on the grounds that this is contrary to international
conventions for the use of satellites. We specifically ask national
telecommunications authorities to take up the issue at an upcoming meeting of
the International Telecommunication Union in Geneva.”
For his part, IBB’s Dave Shiben
expects Iran’s jamming “to be a hot topic” at the ITU World Radiocommunication
Conference (WRC 2012) taking place this month.
Will the WRC bring the Iranians to
heel? RNW’s Jan Hoek doesn’t think so.
“Formal complaints to the ITU can
help to raise awareness of what Iran is believed to be doing, and cause some
embarrassment to the Iranian government, but so far this has not stopped the
jamming,” he told Radio World.
“It’s impossible to stop someone
uploading a signal to a satellite if they know the technical parameters ... In
the short term, the only answer is to switch to a different satellite and hope
it takes a while for the Iranians to discover the new parameters.”