Merge pull request #3 from mediasanctuary/better-time-series

Better time series

README.md

@@ -8,8 +8,8 @@ Each day a GitHub Actions workflow runs `node scripts/index.js` to incrementally
 
 ## Dependencies
 
-* [node.js v18](https://nodejs.org/)
-* [PurpleAir API key](https://develop.purpleair.com/)
+-   [node.js v18](https://nodejs.org/)
+-   [PurpleAir API key](https://develop.purpleair.com/)
 
 ## Developer Setup
 
@@ -35,7 +35,7 @@ Each sensor's historical records are stored in `data/sensor-[id]` folders. Batch
 ### records columns
 
 1. `id` - PurpleAir sensor ID
-2. `timestamp` - Unix epoch timestamp
+2. `time_stamp` - Unix epoch timestamp
 3. `pm2.5_alt_a` - PM 2.5 ALT cf=3 channel A
 4. `pm2.5_alt_b` - PM 2.5 ALT cf=3 channel B
 5. `pm2.5_atm_a` - PM 2.5 ATM channel A
@@ -46,15 +46,36 @@ Each sensor's historical records are stored in `data/sensor-[id]` folders. Batch
 10. `humidity` - relative percentage humidity
 11. `pressure` - pressure in Millibars
 
+## Time Series
+
+Combined readings from all sensors over the last 7 days is available in `data/time-series.csv`.
+
+### time-series.csv columns
+
+Sensor columns are sorted numerically by ID.
+
+1. `Time` - date/time in ISO 8601 format (UTC timezone)
+2. `North Central Troy #1 (87173)` - 10 minute averaged AQI readings
+3. `South Troy #2 (149970)` - 10 minute averaged AQI readings
+4. `Rensselaer #6 (151502)` - 10 minute averaged AQI readings
+5. `Cohoes (156051)` - 10 minute averaged AQI readings
+6. `Cohoes #17 (156171)` - 10 minute averaged AQI readings
+7. `Cohoes (164327)` - 10 minute averaged AQI readings
+8. `Cohoes #15 (164351)` - 10 minute averaged AQI readings
+9. `Rensselaer #10 (166327)` - 10 minute averaged AQI readings
+10. `Lansingburgh #8 (166331)` - 10 minute averaged AQI readings
+11. `Cohoes #14 (166371)` - 10 minute averaged AQI readings
+12. `Stephentown #22 (166653)` - 10 minute averaged AQI readings
+
 ## Data Attribution
 
 Source: [PurpleAir](https://map.purpleair.com/1/mAQI/a10/p604800/cC0#12.04/42.7431/-73.6769)
 
 ## References
 
-* [Sensor map](https://map.purpleair.com/1/mAQI/a10/p604800/cC0#12.04/42.7431/-73.6769)
-* [Sensors - Get Sensor History](https://api.purpleair.com/#api-sensors-get-sensor-history)
-* [What is the Difference Between CF=1, ATM, and ALT?](https://community.purpleair.com/t/what-is-the-difference-between-cf-1-atm-and-alt/6442)
+-   [Sensor map](https://map.purpleair.com/1/mAQI/a10/p604800/cC0#12.04/42.7431/-73.6769)
+-   [Sensors - Get Sensor History](https://api.purpleair.com/#api-sensors-get-sensor-history)
+-   [What is the Difference Between CF=1, ATM, and ALT?](https://community.purpleair.com/t/what-is-the-difference-between-cf-1-atm-and-alt/6442)
 
 ## Data Attribution