1) The Site Development Branch within the Huntsville Center Directorate of Engineering has a requirement for highly specialized Land Surveying / Global Navigation Satellite System (GNSS) equipment which can be procured through a firm-fixed price contract. The requirement is to provide Surveying / GNSS / Laser Scanning systems and equipment to the U.S. Army Corps of Engineers, Huntsville Center. This will fulfill Site Development's requirement to continue support of RFP development, in-house design and other surveying support to various programs.

2) Currently, USACE Huntsville Center, Civil Structures division has Trimble Navigation, LTD equipment consisting of a VX robotic total station, R8 GNSS base and rover system, Trimble Access data collection software and Trimble Business Center processing software. The required equipment needs to be compatible with and have "plug and play" operability with the current system. The functionality of the required systems must be controllable with the current data collection software and the new data collection system must be
a) Total Station
i) Accuracy (Standard Deviation based on DIN 18723)) - 5"

3) True dual axis compensation - instrument capable of controlling the existing equipment. This operational and equipment compatibility ensures minimal additional training time and interchangeability with current survey equipment. This equipment is needed in order to continue and enhance our surveying support of in-house RFP development, in-house design, and other tasks requested by our customers.

4) Required Minimum Specifications
i) shall electronically CORRECT mis-leveling in both the horizontal and vertical planes. Compensator accuracy must be 0.5" or greater.
ii) Distance Measurement
(1) Accuracy (ISO) - 1mm + 2ppm (Prism Standard Mode)
(2) Accuracy (RMSE) - 2mm + 2ppm (Prism Standard Mode); 4mm + 2mm (Prism Tracking)
(3) Accuracy (Direct Reflectivity (DR)) - 2mm + 2ppm (Standard); 4mm + 2ppm (Tracking)
iii) Measuring Time
(1) Prism
(a) Standard - 1.2 sec
(b) Tracking - 0.4 sec
(2) DR
(a) Standard - 1-5 sec
(b) Tracking - 0.4 sec
iv) Measurement Range
(1) 1 Prism - 2500m
(2) DR Mode (90% reflective) - Good Visibility (Low Ambient Light/ no heat shimmer): 1300m; Normal Visibility (moderate Sunlight, minor heat shimmer): 1300m; Difficult Visibility (haze, direct sunlight, turbulence): 1200m.
v) Servo System
(1) Electromagnetic servo driven
(2) Rotation Speed - 155 degrees per second or greater
(3) Face to Face rotation time - 2.6 seconds or greater
vi) Telescope
(1) Magnification - 30x
(2) Aperture - 40mm
(3) Field of View @ 100m - 2.6m (min)
(4) Focusing Distance - 1.5m - Infinity
vii) Communication - Must have USB, Serial and Bluetooth capabilities
viii) Radio Communication - Internal radio, 2.4 GHz frequency-hopping, spread spectrum radios.
b) GPS / GNSS equipment
i) Measurements
(1) Satellite Tracking
(a) L1C/A, L1C, L2C, L2E, L5
(b) GLONASS: L1C/A, L1P, L2C/A, L2P, L3
(c) SBAS: L1C/A, L5
(d) Galileo: E1, E5a, E5B
(e) BeiDou (COMPASS) B1, B2
(f) QZSS, WAAS, EGNOS, GAGAN
(g) Minimum 440 channels for SV tracking
(2) Positioning rates: 1Hz, 2Hz, 5Hz, 10Hz, and 20Hz
(3) Receiver must be able to maintain RTK accuracies in the event of a radio or cellular signal loss for up to 5 minutes. Receiver must have the ability to automatically switch back to normal RTK corrections if radio or cellular signal is regained within 5 minute timeframe
(4) Receiver must work seamlessly with a controller that has the ability to display an electronic level bubble (via an uninterrupted Bluetooth connection)
(5) Electronic level bubble must have the ability for the controller to store tilt for RTK measurements.
ii) Positioning Performance
(1) Code Differential
(a) Horizontal - 0.25m + 1ppm RMS
(b) Vertical - 0.5m + 1ppm RMS
(2) Static GNSS
(a) High Precision Static (Long Observations)
(i) Horizontal - 3mm+0.1 ppm
(ii) Vertical - 3.5mm + 0.4 ppm
(b) Static and Fast Static
(i) Horizontal - 3mm + 0.5 ppm
(ii) Vertical - 5mm + 0.5 ppm
(c) Real Time Kinematic (RTK)
(i) Horizontal - 8mm + 1ppm
(ii) Vertical - 15mm + 0.5 ppm
(3) Communications and Data Storage
(a) USB v2.0
(b) Bluetooth - fully integrated and sealed
(c) WiFi: access point and client mode, WEP64/WEP128 encryption
(d) Cellular: Integrated phone modem
(e) Radio Modem: fully integrated, sealed 450 MHz wide band receiver / transmitter
(i) Transmit Power: 2W
(ii) Range: 3-5km
(f) CMR+, CMRx, RTCM 2.1, RTCM 2.3, RTCM 3.0, RTCM 3.1 input and output
(g) Web User Interface
(i) Accessible via WiFi, Serial, USB and Bluetooth
(4) Laser Scanner
(a) Must meet Laser Class 1 (IEC EN60825-1)
(b) Capable of 1,000,000 points per second
(c) Field of View
(i) Horizontal - 360 degrees
(ii) Vertical - 300 degrees
(d) Range - 120m on 18-90% reflectivity; 100m on low reflectivity (5%)
(e) Noise
(i) Standard Modes - 2mm from 2m to 120m on 18-90% reflectivity
(ii) High Precision Modes - 1mm from 2m to 80m on 18-90% reflectivity

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