2015_07_02 Initial testing (Mt.Auburn area)

This was my second field measurement.  I was more aware of the consistency of the environments and variety of locations.The light source was hard to keep under control. Even on the same bus, depending on the amount of sunlight, light measurement varied significantly.

Humidity outside around 4 PM was 42%. Garden which was surrounded by the plant was relatively higher, as 50.14%. Subways were more humid than the buses (subway: 50%, bus: 38%). Commercial places such as Burger king and Macy’s had lower humidity level, which were 36.98% and 37.25% each.

Temperature outdoor around 4 PM was 27oC. The temperature dropped drastically after 6:30 PM to 23.62 oC.

Harvard Square bus station had the lowest altitude (7.96m) which was even lower than the subway stations.

Hydrogen level was especially higher in indoor locations such as Burger king, and Macy’s, where a lot of people were concentrated in a limited space. In the subway, during a rush hour where there were much more people than the previous subways, Hydrogen level was about 26 higher.I visited 5 red line subway stations; Harvard Square, Central Square, Kendall, Charles, and Park Street stations. Out of five stations, Charles station was the brightest because it was an outdoor station. The darkest station was Kendall station, which had 35 lux. The humidity of the five stations were about the same but Park Street station was the most humid (49.21%) and Charles station was least humid (42.06%). Harvard Square station was the hottest (28.59oC), and Kendall station was the coolest (26.31oC). Central Square station was the lowest altitude station (9.08m). Charles station which was outside had the highest altitude (20.7m). Harvard Square station had the lowest ceiling and Central Square station had the highest ceiling. Hydrogen level was highest in Park Street station (128.64). Park street station had a connection to Green line, which means that there were more passengers in the station. According to today’s measurements, more people means higher Hydrogen level.