Statement_of_Need_and_Salient_Characteristics__Terrestrial_Laser_Scanner__OSMRE_IR_3_4_6__5_24_2023_2.docx

Statement of Need, Salient Characteristics and Deliverables Terrestrial Long-Range LiDAR Scanner OSMRE IR 3, 4 and 6 (Alton, IL)

FY 2023

General Information/Statement of Need

The Office of Surface Mining, Reclamation and Enforcement (OSMRE) seeks to purchase a long-range, high accuracy, high precision ground-based (i.e., terrestrial) laser scanner (TLS), with the ability to collect surface/elevation data over the large distances associated with open-pit coal mining and coal mining reclamation projects. This scanner will serve to strengthen OSMRE’s technical services division’s capabilities by providing a tool to quickly model (scan) the terrain at both active and abandoned coal mining sites, and create large, high-accuracy point clouds which aid in the creation of subsequent data products such as digital surface models (DSMs), digital terrain models (DTMs), classified point clouds, surface meshes, and contour maps. These data products are important to OSMRE’s mission as it relates to technical services provided to States and Tribes on traditional fee-based AML projects, BIL projects, AML emergencies and active (Title V) sites. Applications of these data products include:

Cut Fill Analysis Volumetric calculations including mining pit and spoil pile modeling Creation of as-built and existing surfaces (DTMs) Modeling of surface configuration to ensure compliance with various SMCRA regulations (backfilling/grading, AOC, etc.)

The TLS will also serve to complement existing technical workflows. For example, data files exported by the scanner and scanner software (including LAS/LAZ formats) will be used directly in existing TIPS software, such as GIS and CAD. This data can also be combined with other ground-based data (such as GNSS-captured ground control points) or combined with airborne surveys such as photogrammetry or LiDAR-derived aerial surveys. Our existing GNSS hardware will be used for precisely geolocating control points in the scans or used as quality control checkpoints. The scanner shall possess the capabilities as noted below.

Technical Specifications/Salient Characteristics:

The following salient characteristics are required for the long-range, high-speed, terrestrial based LiDAR scanner (hardware requirements):

· Camera: High-resolution external mount DSLR camera with USB power supply. Images captured simultaneous during scanning

· Scan Registration: Automatic scan registration while moving (as background process)

· Laser Product Class: Eye Safety Class 1 (eye safe) per IEC 60825-1:2014

· Operating Mode/Measuring Principles: Time of flight measurement, echo signal digitation, online waveform processing, multiple-time-around processing, single pulse ranging

· Maximum Measurement Range at 90% reflectivity: up to 2,500 m at 50 kHz

· Maximum Measurement Range at 20% reflectivity: up to 1,300 m at 50 kHz

· Minimum Range: 1.0m at 600kHz

· Minimum targets per pulse: 4 (First and Last). Greater than 4 preferred.

· Laser Pulse Repetition Rate: 50kHz to 1.2 MHz

· Effective Measurement Rate (meas./sec): 21,000 to 500,000 (meas/sec)

· Ranging Accuracy: 5 mm

· Ranging Precision: 3 mm

· 3D Position Accuracy: 3 mm @ 50m, 5 mm @ 100m

· Laser Wavelength: Near Infrared

· Field of View: 100° vertical / 360° horizontal

· Waveform Data Output: Optional (Preferred)

· Angular Accuracy: 0.0028 deg (10 acrsec)

· Laser Beam Divergence: 0.19 mrad @ 1/e, 0.27 mrad @ 1/e2

· Orientation Sensors: Integrated 3-axis accelerometer, 3-axis gyroscope, 3-axis magnetometer (compass), barometer

· GNSS Receiver: At a minimum, integrated L1 GPS receiver, concurrent collection of GPS, GLONASS, Beidou. Real Time Kinematics RTK capability via GNSS Correction service via internet or Emlid Reach RS2 Base station.

· Laser Plummet: Integrated

· Power supply: 11-34 Volt DC, 70W power consumption, battery powered with LiION, NiMH or similar battery supply with optional external power source Scanning Software Technical Requirements:

Acquiring Data:

· Scanner and Configuration Control

· Scan and Image Data in Real-time

· Instant Target Selection

· Real-time data transfer and preview Viewing Data:

· 2D and 3D viewing

· View by attributes

· 3D animations and ortho plots Processing Data:

· Data Adjustment

· Project Georeferencing

· Filtering and Scan Position Registration Analyzing and Exchange of Data:

· Meshing

· Volume Calculation

· Surface Comparison

· Export of LAS/LAZ and/or CAD formats included Deliverables:

· Long-Range High-Accuracy Terrestrial Laser Scanner

· Integrated external-mounted DSLR camera bundle including all brackets, cables, mounts

· Ancillary equipment, range poles, brackets, mounts, reflective targets, LiION, NiMH or similar batteries and AC power supply

· Required software for data collection, post processing and exporting data products such as colorized, georeferenced point clouds

· Hands-on, in-person field training for up to 4 employees on all hardware and software