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(单词翻译:双击或拖选)
SatelliteTechnology Helps Human Rights Monitors
AU.N. panel of experts is expected to release a report soon citing evidence of war crimes in the final months of Sri Lanka's civil war. Among the evidence the panel reviewed was satellite imagery from the final days of the conflict.
In May of 2009, when the Sri Lankan army had insurgent1 Tamil Tiger forces flanked in the country's Northeast, analyst2 Lars Bromley pored over two sets of satellite imagery for the American Association for the Advancement3 of Science. Human Rights Watch and Amnesty International had turned to AAAS because they were concerned about the safety of civilians5.
Two sets of images were captured - one at the start of a heavy battle on May 6, and one when fighting abated6 on May 10. Bromley says visible shell craters7 offered possible evidence Sri Lanka was firing into an area it had designated as a civilian4 safety zone.
"We were basically able to basically locate multiple mortar8 locations that corresponded with the locations of the craters and the pattern of the ejecta [material ejected] from the craters. They were Sri Lankan Army positions," he said.
Bromley says there was more disturbing visual evidence. "There were definitely significant expansions between May 6 and May 10 that were going on in the number of graves," he recalled.
Makeshift camps of people displaced by the Sri Lankan civil war were also gone from the second image. Bromley said it appeared the camps were being hastily dismantled9 by people in fear of their lives. "With all the other information that we were piecing together at the time, that was a pretty good call to make - that they were fleeing, and that it was a chaotic10 situation going on," Bromley said.
Satellites have increasingly been used to monitor suspected human-rights abuses in recent years, but cost still is an obstacle: a single high-resolution image can cost as much as $10,000.
Bromley says the potency11 of satellite imagery increases when it meshes12 with other technologies. Mobile phone and web-based "crowdsourcing" platforms like Ushahidi (www.ushahidi.com) make it possible to create a dynamic and interactive13 crisis map to help flesh out the information in a satellite snapshot.
"The magic happens when you start pulling all these things together and you use them as an array of tools to understand what's going on. The more you understand what's going on, the more likely you are to influence the policy decisions," Bromley explained.
Still, satellite images seldom convey the legal or moral nuances of a conflict. In the case of Sri Lanka, for example, the U.N. experts' report accuses Tamil Tiger rebels of taking refuge in designated safe zones - effectively using the civilians there as human shields, and shooting them if they attempted to escape.
Bromley says it is also difficult for satellites to capture the moves of a guerrilla force like the Tamil Tigers. "They would just kind of run out with a mortar tube and fire a few shots," he said. "And run back into a shelter. That kind of stuff doesn't appear on a satellite image at all."
As a result, a single image may at times give a misleading view of what has happened on the ground.
"You're not able to equally document the actions of both sides," Bromley stated. "You're able to document the sort of 'Earth-moving' things that one side is doing, but you're not able to document the 'shoot and scoot' sort of stuff the other side is doing."
There are also serious ethical14 concerns related to making satellite images available to the public.
"If you're releasing that sort of information in real time, in an environment where people are getting killed, you've got to consider how that information is being used," he said. "It's not all being used for altruistic15 purposes. There are bad people that will have access to that sort of information as well."
Bromley now analyzes16 satellite images for UNOSAT, a United Nations program that assists humanitarian17 groups. He says UNOSAT is not publicizing everything it sees in images of Libya, to avoid giving a tactical advantage to either side in that country's civil strife18.
1 insurgent | |
adj.叛乱的,起事的;n.叛乱分子 | |
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2 analyst | |
n.分析家,化验员;心理分析学家 | |
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3 advancement | |
n.前进,促进,提升 | |
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4 civilian | |
adj.平民的,民用的,民众的 | |
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5 civilians | |
平民,百姓( civilian的名词复数 ); 老百姓 | |
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6 abated | |
减少( abate的过去式和过去分词 ); 减去; 降价; 撤消(诉讼) | |
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7 craters | |
n.火山口( crater的名词复数 );弹坑等 | |
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8 mortar | |
n.灰浆,灰泥;迫击炮;v.把…用灰浆涂接合 | |
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9 dismantled | |
拆开( dismantle的过去式和过去分词 ); 拆卸; 废除; 取消 | |
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10 chaotic | |
adj.混沌的,一片混乱的,一团糟的 | |
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11 potency | |
n. 效力,潜能 | |
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12 meshes | |
网孔( mesh的名词复数 ); 网状物; 陷阱; 困境 | |
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13 interactive | |
adj.相互作用的,互相影响的,(电脑)交互的 | |
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14 ethical | |
adj.伦理的,道德的,合乎道德的 | |
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15 altruistic | |
adj.无私的,为他人着想的 | |
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16 analyzes | |
v.分析( analyze的第三人称单数 );分解;解释;对…进行心理分析 | |
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17 humanitarian | |
n.人道主义者,博爱者,基督凡人论者 | |
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18 strife | |
n.争吵,冲突,倾轧,竞争 | |
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