Changes between Version 1 and Version 2 of Architecture/Deployment/Measurements/s3-lg1

Timestamp:

Apr 4, 2021, 3:47:11 PM (4 years ago)

Author:

mpk2138

Comment:

—

Architecture/Deployment/Measurements/s3-lg1

@@ -1 +1 @@
 Node {{{s3-lg1}}} is the third sector of [https://wiki.cosmos-lab.org/wiki/Hardware/Nodes#LargeNode Large Node] 1, located on the roof of the Mudd Building at Columbia University. Unlike sectors 1 and 2, sector 3's [https://wiki.cosmos-lab.org/wiki/Hardware/antennas#Directionallargenodesector antenna] is pointed in a southerly direction overlooking the Columbia Morningside Heights campus. 
 
+==== Coverage
 [https://wiki.cosmos-lab.org/wiki/Hardware/Nodes/Measurements Coverage measurements] were performed around the campus area in August 2020. In total, 201 measurements were taken in a roughly 5m-spaced grid in the campus area. The measurement results are presented below.
 
-==== Coverage
+ || [[Image(rssi_coverage_map_s3-lg1.png, 800px)]] 
+ || Figure 1: Coverage measurement results for {{{s3-lg1}}}.
 
+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. 
+
+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.
+
+==== To-Do
+Measurements on Broadway (the street to the east of Figure 1) 
+
+Measurements further to the south towards the Butler Library.