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2. AN/FPS-117 - Wikipedia

   en.wikipedia.org/wiki/AN/FPS-117

   The system is a long range (up to 250 nautical miles or 460 kilometres), [6] L-band pencil beam search radar with solid-state transmitters. The AESA principle uses active transmitters in each individual antenna in the 44-by-32 antenna array.

3. AN/SPS-48 - Wikipedia

   en.wikipedia.org/wiki/AN/SPS-48

   The NTDS Technical and Operational Requirements, written in 1956, called for two radar systems: a three-dimensional search radar with a range of more than 200 miles that can turn over targets to missile and gun radars, and a two-dimensional long-range search radar able to detect relatively small targets at ranges over 250 miles, which can hand targets to the three-dimensional radar once they ...

4. Long-range Wi-Fi - Wikipedia

   en.wikipedia.org/wiki/Long-range_Wi-Fi

   A long-range seismic sensor network was used during the Andean Seismic Project in Peru. A multi-hop span with a total length of 320 kilometres (200 miles) was crossed with some segments around 30 to 50 kilometers (19 to 31 miles). The goal was to connect to outlying stations to UCLA in order to receive seismic data in real time. [2]

5. Joint Surveillance System - Wikipedia

   en.wikipedia.org/wiki/Joint_Surveillance_System

   This provides common, high-performance, unattended radars. The ARSR-4/FPS-130 is a 3-D long range radar with an effective detection range of some 250 miles and has been fully integrated with JSS at all joint use sites. These radars are generally unattended except for periodic FAA maintenance crews which visit the sites as necessary.

6. AN/PRC-150 - Wikipedia

   en.wikipedia.org/wiki/AN/PRC-150

   The PRC-150 is particularly popular for use in dismounted reconnaissance units, such as the US Army's Long Range Surveillance units (now deactivated), IBCT Dismounted Reconnaissance Troops (DRT) and IBCT Infantry battalion scout platoons. This is due to the fact that the PRC-150 can achieve Beyond Line-Of-Sight (BLOS) communications over 1500 ...

7. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   An elaborated and expanded version of a 'T' antenna; it is a very large wire transmitting antenna used on VLF bands for VLF time signals or long-range submarine communications. Relative to the even larger wavelengths it is used for, although the antenna is enormous on human-scale it is paradoxically an ultra-short antenna.