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HomeMy WebLinkAbout03_YB_Appx 03-I_Magnetometer Survey Procedures DATA ACQUISITION & PROCESSING REPORT UNMANNED AERIAL VEHICLE MAGNETIC SURVEY – YORK RUN/YELLOW BARN, NEW YORK OCTOBER – DECEMBER 2022 Proprietary and Confidential This document contains proprietary and confidential information of Juniper Unmanned and Is to be used solely for the conduct of this project. 2 Project Summary The following documentation supports the data acquisition and processing techniques by Juniper Unmanned. The purpose of the project was to conduct a site-specific aerial magnetic survey for both York Run and Yellow Barn Areas of Interest located near Kiantone, NY and Lansing, NY, respectively. Final processed data was delivered to CS Energy on behalf of Aerodyne Measure. Mission Description Juniper performed detailed mission-specific planning for each Area of Interest project prior to mobilization. The mission plan was revised following mobilization to the site and during the mission as needed. • Launch and recover zones were examined and picked for maximum efficiency of flight operations and security. A boom lift was strategically positioned so that the Remote Pilot in Command (RPIC) maintained visual line of sight throughout the mission. The sterile area from which Juniper operated was clearly demarcated with cones and a yellow hazard light on the truck. • Altitudes: Sensor height ranging from 50 m to 55 m • Speed: 8 m/s • Number of flights: 58 • Direction of flight lines: 0-10 degrees • Direction of tie lines: 80-100 degrees • Line spacing: 25 m • Average time per flight: 35 minutes • Total flight time: 608 minutes (10 hours, 8 minutes) • Explanation for varying flight plans: Flights were designed to avoid all housing and businesses. Some flights varied in altitude above ground due to observed safety concerns caused by topography changes and varying tree canopy height. • Operational restrictions: o Operations were conducted with class G and class E aispace o No LANNC Authorizations were needed o Flights occured between civil sunrise and civil sunset o Operations were completed within visual line of sight per FAA part 107 regulations. The Pilot in Command maintained visual line of sight using a boom lift. o Operations were restricted to less than 400 feet above ground level per FAA part 107 regulations o Temporary flight restrictions and NOTAMs were checked prior to the start of collection each day o Local police operations were contacted prior to the start of collection each day o Meteorological conditions were checked prior to the start of collection each day. Acceptable conditions include 3 mile visibility, ceiling of 1000’. o Maximum wind speed (for data collection) = 20 mph 3 Technology Description – Aircraft Skyfront Perimeter 8+ (manufactured in United States) • Heavy-lift gas-electric hybrid octocopter • Maximum Gross Take-Off Weight (Combined weight of aircraft, fuel, and sensor): <55 lbs., <24.9kg under Part 107 regulations. Skyfront with 4L fuel and tethered magnetometer: 44.37 lbs., • Propulsion: 8 electric motors • Sensor: Geometrics MagArrow • Ground Control Station: Hand-held flight controller w/ laptop running Skyfront Ground Control • Telemetry: Command & Control only, 2.4-2.483 GHz, AES128 encrypted DJI Matrice 600 Pro • Hexa-copter • Maximum Gross Take-Off Weight: 15.5 kg • Propulsion: electric motors • Sensor: Geometrics MagArrow • Ground Control Station: Hand-held flight controller w/ tablet • Telemetry: Command & Control only, 2.4-2.483 GHz, unencrypted Flight Crew Remote Pilot in Command/Visual Oberver and Sensor Operator • Name: Noah Coleman • Certificate: 14 CFR Part 107 Remote Pilot in Command/Visual Oberver and Sensor Operator • Name: Ryan Toal • Certificate: 14 CFR Part 107 Remote Pilot in Command/Visual Oberver and Sensor Operator • Name: Noah Garris • Certificate: 14 CFR Part 10 4 Project Pictures 5 Example of Mission Flight Lines Primary mission flight transects with 25 meter side spacing Tie-line flight transects with 150 meter side spacing 6 Description of Data Processing The York Run and Yellow Barn flight data files and flight logs were uploaded daily by EDCON-PRJ in November and December of 2022. Initial processing began with the trimming of line-ends to eliminate bird swing at the beginning of lines. A Gaussian filter with a sample spacing of one fid and a standard deviation of 8 was applied to the raw magnetics as is always the procedure with Juniper drone data. The data was then decimated from 1,000 Hz to 10 Hz. USGS base data were available from the Fredericksburg Virginia Intermagnet Observatory, located 280 miles south of the survey areas. These data were downloaded and a constant of 1,500 nT was removed to level them with the base data at the survey site. A 2.5 second smoothing filter was then applied to the base data in preparation of diurnal variation removal. A compensation routine removed magnetic noise from the raw data. Additionally, a 10-second low-pass filter was found to be the optimal filter for removing noise caused by bird swing and was applied to the raw magnetics data channel on each flight to remove noise from the profiles. IGRF and filtered base magnetics were removed from the filtered magnetics and DC leveling was applied. Line pulls were still present after DC leveling. Depth slicing was then applied to the data and a slight strike filter was applied to the intermediate component to remove any remnant line-pulls. The deep and intermediate components were then added together and used as a leveling surface in micro-leveling resulting in the final leveled magnetics. Gridding was done using minimum-curvature gridding with a grid spacing of 10 meters. Using the gridded data, magnetic highs were selected using a grid peak algorithm. Peak locations were checked against current and historical imagery data to interpret the possible source. Projection Information Projection: UTM Central Meridian: 81 West (zone 17) Spheroid: WGS84 Datum: WGS84 Grid Size: 10 Meters False Northing: 0 False Easting: 500,000 Meters Deliverables A. Geosoft Maps • York Run Priority 1.kmz: Total Magnetic Anomaly Map • York Run Priority 2.kmz: Total Magnetic Anomaly Map • York Run Priority 3.kmz: Total Magnetic Anomaly Map • YellowBarnFinal.kmz: Total Magnetic Anomaly Map B. Digital Database • YR_priority_one.gdb: Survey magnetic data in Geosoft Database format 7 • YR_priority_two.gdb: Survey magnetic data in Geosoft Database format • YR_priority_3.gdb: Survey magnetic data in Geosoft Database format • YBFinal.gdb: Survey magnetic data in Geosoft Database format • York Run Priority 1.csv: Well peak location data in ASCII CSV format • York Run Priority 2.csv: Well peak location data in ASCII CSV format • York Run Priority 3.csv: Well peak location data in ASCII CSV format • YBPicks.csv Well peak location data in ASCII CSV format Magnetic Survey Line Data Format Channel Description Units Latitude Latitude(WGS84) Decimal Degrees Longitude Longitude(WGS84) Decimal Degrees X UTM X Meters Y UTM Y Meters Counter System counter Date Date yyyy/mm/dd Time UTC Time hh:mm:ss.s mag Raw Magnetics nT Base Diurnal Magnetics nT Altitude Sensor height above ground meters Igrf International Geomagnetic Reference Field nT Comp_mag Compensated Magnetics nT ch_4 Final Leveled Magnetics nT Addendum Additional material may be supplied if requesting, including: • Flight logs (.csv) • Flight lines (.kml) • Raw magnetic data from each flight (.csv) • Daily safety tailboards