| | 1 | Node {{{s1-lg1}}} is the first sector of [https://wiki.cosmos-lab.org/wiki/Hardware/Nodes#LargeNode Large Node] 1, located on the 18th floor roof of the Mudd Building at Columbia University, roughly 55m above the campus level and 65m above the street level. Sector 2's [https://wiki.cosmos-lab.org/wiki/Hardware/antennas#Directionallargenodesector antenna] is pointed to the northeast overlooking Amsterdam Ave. |
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| | 3 | '''''Contributors''': Sabbir Hossain, Jared Moser'' |
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| | 5 | '''''Data''': [https://wiki.cosmos-lab.org/raw-attachment/wiki/Architecture/Deployment/Measurements/s1-lg1/rssi_coverage_map_s1-lg1.csv Available here (CSV)]'' |
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| | 7 | ==== Node photographs |
| | 8 | ||||||Figure 1: Photographs of s2-lg1 || |
| | 9 | || [[Image(s1-lg1_roof.jpg, 600px)]] || |
| | 10 | || Looking down from Mudd building rooftop. || |
| | 11 | |
| | 12 | ==== Coverage |
| | 13 | [https://wiki.cosmos-lab.org/wiki/Hardware/Nodes/Measurements Coverage measurements] were performed around the node area in July 2021. In total, 457 measurements were taken in the streets around the large node. The measurement results are presented below. |
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| | 15 | |||||| Figure 2: Coverage measurement results for {{{s1-lg1}}}. || |
| | 16 | || [[Image(rssi_coverage_map_s1-lg1.png, height=400px)]] || [[Image(s1-lg1_antenna_coverage.png, height=400px)]] || |
| | 17 | || (a) Measurement results || (b) 60 degree 3dB antenna beamwidth displayed over measurement map || |
| | 18 | |
| | 19 | The measurements show above -65 dBm RSSI at a link distance over 600m distance away. These measurements demonstrate that s1-lg1 provides coverage to a significant portion of Amsterdam Ave even past 125th St. |
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| | 21 | ==== Future Work |
| | 22 | |
| | 23 | Further measurements on Amsterdam Ave. to cover more distance, as well as measurements on side streets. |
