On the accuracy of registrations of ascended and descended floors in iPhones

If you use these data in a publication, please cite

Jan Peter van Zandwijk, Kim Lensen, Abdul Boztas, Have you been upstairs? On the accuracy of registrations of ascended and descended floors in iPhones, Forensic Science International: Digital Investigation, Volume 47, December 2023, 301660.

CSV data column legend

• Test subject - Code corresponding to test subject.
• Telephone - Code corresponding to type of iPhone. Format: Type (iOS version).
• Carrying location - Specification where phone was carried.
• Date - Format YYYYMMDD.
• Trial - Sequencenumber in measurement session.
• Floor height - Specified in number of substairs of 1.20 m.
• Speed - W=walking, R=running, WL=walking and elevator, RT = escalator, RTW = walking on escalator.
• Pause - Yes=pause at end of this trial, No=no pause at end of this trial.
• Measured # steps steps as measured by tally counter by test subject.
• Floors healthdb_secure.sqlite - Number of floors by matching traces to experimental trial.
• Floors cache_encryptedC.db - Number of floors by matching traces to experimental trial.
• Measured number of floors - Number of floors of height specified in Floor height.

For floors, positive numbers indicate ascending and negative numbers indicate descending.