f****l
发帖数: 8042 | 1 感觉随着技术进步，天空部署才是未来啊？几十或者上百颗卫星怎么也比地面无数的基
站成本低廉吧。懂行的评论一下？貌似现在Iridium美军一直在用， 并没有放弃。技术
成熟成本降低后，军事转为民用也有可能。
Next-generation constellation
In 2017, Iridium began launching[18][19][20][21] Iridium NEXT, a second-
generation worldwide network of telecommunications satellites, consisting of
66 active satellites, with another nine in-orbit spares and six on-ground
spares. These satellites will incorporate features such as data transmission
that were not emphasized in the original design.[22] The constellation will
provide L-band data speeds of up to 128 kbit/s to mobile terminals, up to 1
.5 Mbit/s to Iridium Pilot marine terminals, and high-speed Ka-band service
of up to 8 Mbit/s to fixed/transportable terminals.[23] The next-generation
terminals and service are expected to be commercially available by the end
of 2018.[24] However, Iridium's proposed use of its next-generation
satellites has raised concerns the service will harmfully interfere with GPS
devices.[25]
The satellites will incorporate a secondary payload for Aireon,[26] a space-
qualified ADS-B data receiver. This is for use by air traffic control and,
via FlightAware, for use by airlines.[27] A tertiary payload on 58
satellites is a marine AIS ship-tracker receiver, for Canadian company
exactEarth Ltd.[28]
Iridium can also be used to provide a data link to other satellites in space
, enabling command and control of other space assets regardless of the
position of ground stations and gateways.[22] | h*********3
发帖数: 1 | 2 光速是多少？
of
transmission
will
1
【在 f****l 的大作中提到】
: 感觉随着技术进步，天空部署才是未来啊？几十或者上百颗卫星怎么也比地面无数的基
: 站成本低廉吧。懂行的评论一下？貌似现在Iridium美军一直在用， 并没有放弃。技术
: 成熟成本降低后，军事转为民用也有可能。
: Next-generation constellation
: In 2017, Iridium began launching[18][19][20][21] Iridium NEXT, a second-
: generation worldwide network of telecommunications satellites, consisting of
: 66 active satellites, with another nine in-orbit spares and six on-ground
: spares. These satellites will incorporate features such as data transmission
: that were not emphasized in the original design.[22] The constellation will
: provide L-band data speeds of up to 128 kbit/s to mobile terminals, up to 1
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