| | 1 | Node {{{md2}}} is a [https://wiki.cosmos-lab.org/wiki/Hardware/Nodes#MediumNode Medium Node] located on the second floor of the Mudd Building at Columbia University, overlooking Amsterdam Avenue. The [https://wiki.cosmos-lab.org/wiki/Hardware/antennas#Omni-directionalmediumnode omni-directional antenna] has line-of-sight to the majority of Amsterdam Ave. between 116th St. and 122nd St., as well as to parts of 120th St. and 119th St. headed east. |
| | 2 | |
| | 3 | ==== Coverage |
| | 4 | [https://wiki.cosmos-lab.org/wiki/Hardware/Nodes/Measurements Coverage measurements] are currently being performed in the area around {{{md2}}}. In total, around 100 measurements have been taken on sidewalks in the area spaced by roughly 5m-spaced. The measurement results are presented below. |
| | 5 | |
| | 6 | || [[Image(rssi_coverage_map_md2.png, 800px)]] |
| | 7 | || Figure 1: Coverage measurement results for {{{md2}}}. |
| | 8 | |
| | 9 | These measurements demonstrate an RSSI of around -85 dBm at a 300 m straight-line distance, even in the presence of multiple buildings blocking line of sight. As would be expected, the locations close to the node experience a high RSSI an hence high SNR. |
| | 10 | |
| | 11 | Of particular note are the measurements in the southeastern area. This area is not only shadowed by several buildings, but is also outside of the beam width of {{{s3-lg1}}}'s antenna. This demonstrates that {{{s3-lg1}}} provides coverage for a significant area of the Columbia campus, making it useful for experiments undertaken in this area. |
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| | 13 | ==== To-Do |
| | 14 | Measurements on Broadway (the street to the east of Figure 1) |
| | 15 | |
| | 16 | Measurements further to the south towards the Butler Library. |
