CRAWDAD columbia/enhants

Citation Author(s):
Maria
Gorlatova
Columbia University
Michael
Zapas
Columbia University
Enlin
Xu
VMTurbo
Matthias
Bahlke
Massachusetts Institute of Technology
Ioannis (John)
Kymissis
Columbia University
Gil
Zussman
Columbia University
Submitted by:
CRAWDAD Team
Last updated:
Thu, 04/07/2011 - 08:00
DOI:
10.15783/C77P47
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Abstract 

Dataset of radiant light energy measurements.

This dataset includes radiant light energy measurements from a study by Columbia University's EnHANTs (Energy Harvesting Active Networked Tags) project.

date/time of measurement start: 2009-08-14

date/time of measurement end: 2010-11-23

collection environment: To characterize indoor energy availability , since 2009 we have been conducting a light energy measurement study in office buildings in New York City. In this study we take longtermmeasurements of irradiance (I, in units W/cm^2) in several indoor locations, and also a set of shorter-term indoor/outdoor mobile device measurements.

network configuration: For the measurements we use TAOS TSL230rd photometric sensors installed on LabJack U3 DAQ devices. These photometric sensors have a high dynamic range, allowing capturing of widely varying irradiance conditions. We verified the accuracy of the sensors with a NIST-traceable Newport 818-UV photodetector.

data collection methodology: Long-term data was collected in static locations on campus of ColumbiaUniversity. Shorter-term experiments were collected by mobile devices.

Tracesets

columbia/enhants/energy

Radiant light energy measurements collected by Columbia University's EnHANTs project.

  • description: This traceset includes radiant light energy measurements collected from 2009 to 2010 in a study by Columbia University's EnHANTs project. 
  • measurement purpose: Energy-efficient Wireless Network
  • methodology: Since June 2009, we have been recording irradiance every 30 seconds in several different static locations using TAOS TSL230rd light-to-frequency converters installed on Lab-Jack U3 Data Acquisition boards. We also conducted several short-term experiments where measurement was conducted by sensor devices as they were moved around New York city.

There are multi-day interruptions in data due to power interruptions and device malfunctions.

columbia/enhants/energy Traces

  • columbia/enhants/energy/stationary: This trace consists of long-term irradiance measurements taken at 6 static locations on the campus of Columbia University. Stationary measurements of irradiance done by Columbia University's EnHANTs project.
    • file:
      • SetupA_merged_2009_8_15_2010_9_13.txt.gz 
      • SetupB_merged_2010_11_3_2010_11_24.txt.gz
      • SetupC_merged_2009_11_7_2010_9_13.txt.gz
      • SetupD_merged_2009_11_6_2010_9_28.txt.gz
      • SetupE_2009_6_25.txt.gz
      • SetupF_merged_2010_2_16_2010_4_15.txt.gz
    • configuration: Traces A-F were made in stationary setups indoors.
      • A. Students' office, South-facing, 6th floor above ground; measurement setup located on a windowsill; shading is used at all times. Trace starts on August 14, 2009 and is provided here to September 13, 2009.
      • B. Students' office (same as setup A); setup on a bookshelf far from the window, receiving direct sunlight for a short portion of a day. Trace starts on November 13, 2009, and is provided here up to November 23, 2010.
      • C. Departmental conference room, North-facing, with large windows and an unobstructed view; setup located on a windowsill. Shading use varies (corresponding to the needs and preferences of different affiliates using the conference room). Trace starts on November 6, 2009, and is provided here up to September 13, 2010.
      • D. Students' office; corner window facing South and West; setup placed on a windowsill, shading extensively used. Trace starts on November 5, 2009, and is provided here up to September 29, 2010.
      • E. Students' office directly under the office of setup A; setup on a windowsill, limited use of shading. This was a pilot measurement, done from June 25, 2009 to October 11, 2009.
      • F. Students' office, East-facing; setup on a windowsill; office window often kept partially opened (the setup often receives unattenuated reflected outdoor light). Trace starts on February 16, 2010, and is provided here up to April 15, 2010.
    • format: 
      • * The first column is the number of seconds since the beginning of the experiment.
      • * The second column is the measured irradiance. The measurements are in units of microwatts per cm^2. In records where the measured irradiance is less than 0.01, the file contains 'NaN' instead of the numeric value.
      • * The subsequent columns are the timestamp of the measurement, separated into: year, month, day, hour, minute, second.
  • columbia/enhants/energy/mobile: This trace contains short-term irradiance measurements collected by moving sensor devices. Mobile measurements of irradiance done by Columbia University's EnHANTs project.
    • file:
      • mobile-indoor-outdoor.txt.gz
      • mobile-nyt-nighttime.txt.gz
      • mobile-car.txt.gz
      • mobile-commute.txt.gz
    • configuration:
      • *Indoor + Outdoor Mobile Measurements: pedestrian walking around university  campus (indoor and outdoor environments) carrying a sensor. Measurements date: April 05, 2010.
      • * New York City Nighttime Measurements: pedestrian walking in New York City (Theater District and Times Square) at nighttime, with a sensor attached to a backpack. Measurements date: July 22, 2010.
      • * Car-based roadtrip (sensor attached to the dashboard).
      • * Commuting on public transit, sensor attached to a backpack, measurements outdoors, indoors (office, subway, train).
    • format: 
      • * The first column is the number of seconds since the beginning of the experiment.
      • * The second column is the measured irradiance. The measurements are in units of microwatts per cm^2. In records where the measured irradiance is less than 0.01, the file contains 'NaN' instead of the numeric value.
      • * The subsequent columns are the timestamp of the measurement, separated into: year, month, day, hour, minute, second.
Instructions: 

The files in this directory are a CRAWDAD dataset hosted by IEEE DataPort. 

About CRAWDAD: the Community Resource for Archiving Wireless Data At Dartmouth is a data resource for the research community interested in wireless networks and mobile computing. 

CRAWDAD was founded at Dartmouth College in 2004, led by Tristan Henderson, David Kotz, and Chris McDonald. CRAWDAD datasets are hosted by IEEE DataPort as of November 2022. 

Note: Please use the Data in an ethical and responsible way with the aim of doing no harm to any person or entity for the benefit of society at large. Please respect the privacy of any human subjects whose wireless-network activity is captured by the Data and comply with all applicable laws, including without limitation such applicable laws pertaining to the protection of personal information, security of data, and data breaches. Please do not apply, adapt or develop algorithms for the extraction of the true identity of users and other information of a personal nature, which might constitute personally identifiable information or protected health information under any such applicable laws. Do not publish or otherwise disclose to any other person or entity any information that constitutes personally identifiable information or protected health information under any such applicable laws derived from the Data through manual or automated techniques. 

Please acknowledge the source of the Data in any publications or presentations reporting use of this Data. 

Citation:

Maria Gorlatova, Michael Zapas, Enlin Xu, Matthias Bahlke, Ioannis (John) Kymissis, Gil Zussman, columbia/enhants, https://doi.org/10.15783/C77P47 , Date: 20110407

Dataset Files

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These datasets are part of Community Resource for Archiving Wireless Data (CRAWDAD). CRAWDAD began in 2004 at Dartmouth College as a place to share wireless network data with the research community. Its purpose was to enable access to data from real networks and real mobile users at a time when collecting such data was challenging and expensive. The archive has continued to grow since its inception, and starting in summer 2022 is being housed on IEEE DataPort.

Questions about CRAWDAD? See our CRAWDAD FAQ. Interested in submitting your dataset to the CRAWDAD collection? Get started, by submitting an Open Access Dataset.