2018 methane emission quantification controlled release test at the Merced Vernal Pools and Grassland Reserve with sUAS

Environmental sensing using small unmanned aircraft systems (sUAS) has become more and more desirable due to the spatial temporal resolution and frequency of sampling. A methane controlled release campaign was conducted at the Merced Vernal Pools and Grassland Reserve for the purpose of testing the quantification performance of a sUAS-based methane measurement system using an open path laser spectrometer (OPLS). A single emission source was simulated, and mutiple flights were conducted downwind of the source to measure the emission using a mass-balance method. The wind, sUAS-trajectory, and concentration was measured for each flight. 
, , # 2018 methane emission quantification controlled release test at the Merced Vernal Pools and Grassland Reserve with sUAS

Dataset DOI: [10.5061/dryad.612jm64g9](https://doi.org/10.5061/dryad.612jm64g9)

## Description of the data and file structure

The data set includes the aircraft and measurement data for a controlled release experiment in the Merced Vernal Pools and Grassland Reserve. The data set covers the entire day curtain-based flights for quantifying methane emissions using the mass balance approach. The data is structured such that there are 14 columns and each row corresponds to a time step given by column 1. 

The controlled release rate of methane is 12.9 standard cubic feet per hour (SCFH) and the release location is at: 37.37452N, 120.41487W.

### Files and variables

#### File: 20181106_all.csv

**Description:** 

##### Variables

* time: in milliseconds of the day
* ch4: methane molar ratio in parts per million 
* eth: ethane (not used)
* h20: water (not used)
* press...,