Attach 1 - SON dtd 13 Jan 2025.pdf

GPS Base Station

STATEMENT OF NEED

January 13, 2025

1. Requirement: The Base Station uses RTK (Real-Time Kinematic) technology. With RTK-GPS the Base Station receives signals from GPS System satellites and creates a correction factor for applications that require a higher accuracy, like land surveying. Without a Base Station CE would not be able to support surveying requirements for engineering projects and utilities, environmental requests, airfield operation locates, and to meet emergency management requirements.

2. Characteristics: The GPS Base Station items required are the Transmitter/Receiver Unit that receives the GPS positioning from the satellites and the UHF Radio that transmits the real-time data correction to the field rover.

CLIN 0001: GPS Base Station Transmitter/Receiver/Qty: 1 – Collects Satellite positioning to obtain corrected data for accurate GPS positioning — Trimble R750 GNSS Receiver, MFR R750-101-00 (or Equal)

To be considered “equal”, offered products must meet the following salient functional, physical and performance characteristics:

• Compatible with Trimble Geodetic Antenna, MFR 41249-00

• GNSS Technology

• Advanced satellite tracking

• Front panel display and configuration

• Wi-Fi and 4G LTE connectively

• Bluetooth, Ethernet, serial and USB support

• 8 GB internal memory

• Data logging internally and to external drive

• Support RTK (Real Time Kinematic) level precision

• 7 custom chips with 336 channels

• Flexible signal tracking and improved positioning in GNSS environments

• Very low noise carrier phase measurements with < 1 mm precision in a 1 Hz bandwidth

• Positioning rates: 1 Hz, 2 Hz, 5 Hz, 10 Hz, 20 Hz, 50 Hz

• Static GNSS Surveying

• High-Precision Static

• Horizontal 3 mm + 0.1 ppm RMS

• Vertical 3.5 mm + 0.4 ppm RMS

• Static and Fast Static

• Horizontal 3 mm + 0.5 ppm RMS

• Vertical 5 mm + 0.5 ppm RMS

• Real Time Kinematic (RTK) Surveying

• Single Baseline <30 km

• Horizontal 8 mm + 1 ppm RMS

• Vertical 15 mm + 1 ppm RMS

• Network RTK

• Horizontal 8 mm + 0.5 ppm RMS

• Vertical 15 mm + 0.5 ppm RMS

• RTK start-up time for specified precisions

• 2 to 8 seconds

• RTX Correction Services

• RTX Technology

• Horizontal 2 cm + (0.06 ft) RMS

• Vertical 5 cm + (0.16 ft) RMS

• RTX convergence time for specified precisions in RTX Fast regions

• < 1 min

• RTX convergence time for specified precisions in non RTX Fast regions

• < 3 min

• Code Differential GNSS Positioning

• Horizontal 0.25 m + 1 ppm RMS

• Vertical 0.50 m + 1 ppm RMS

• SBAS typically < 5 m 3DRMS

• Hardware, Physical

• Front display characters

• On/Off button

• Temperature

• Operating -40°C to 65°C (-40°F to 149°F)

• Storage -40°C to 80°C (-40°F to 176°F)

• Humidity

• 93% humidity at 40°C for a duration of 3 hours

• Ingress Protection

• IP67 for temporary submersion to depth of 1 m (3.3 ft), dustproof

• Shock and vibration

• Pole drop Survive a 1.1 m (3.6 ft) pole drop onto a hard surface

• Shock – Non-operating To 75 g, 6 ms

• Shock – Operating To 40 g, 10 ms, saw tooth (IEC 60945 Method 8.7)

• Vibration Random 6.2 g RMS operation, 9.8 g RMS 24-2000 Hz for 1 hrs each axis survival

• Electrical

• Internal battery

• Integrated internal battery 7.26V, 6700 mAh, Lithium-ion

• Operate as a UPS during external power source failure

• Will charge from external power source as long as source can support the power drain and is more than Maximum 28 VDC

• Integrated charging circuitry

• External battery

• Power input on 7-pin 0-shell Lemo connector is optimized for lead acid batteries with a cut-off threshold of 11.5 V, Maximum 28 VDC

• Power input on the 26-pin D-sub connector has cut-off threshold of 10.5 V

• Hot-swap capable power source supply (Internal/External) in the event of power source removal or failure

• Will charge from external power source

• Integrated charging circuitry

• Power consumption

• 5.7 W in rover mode with internal LTE modem

• 6.1 W in base mode with internal LTE modem

• Operation time on internal battery

• Rover 8.5 hours cellular receive (Internal or Controller via Bluetooth)

• Base Station 7.4 hours cellular transmit

• FCC Certified, Part 15 Subpart B (Class B device), subpart C Section 15.2.47, Part 90, Part 22/24/27, Part 2, KDB 447498 D01.

• Communications Certification, PTCRB, Bluetooth SIG

• Communications And Data Storage

• Serial 1 (COM1)

• 7-pin OS Lemo, Serial 1, 3-wire RS-232

• Serial 2 (COM2)

• 26-pin D-sub, Serial 2, 5-wire RS232, using adaptor cable (selectable)

• 26-pin D-sub, Serial 2, 4-wire RS422, using adaptor cable (selectable)

• Serial 3 (COM3)

• 26-pin D-sub, Serial 3, 3-wire RS232, using adaptor cable (selectable)

• Serial 4 (COM4)

• 26-pin D-sub, Serial 4, 4-wire RS422, using adaptor cable (selectable)

• 1PPS (1 Pulse-per-second)

• Supported on both Lemo and 26-pin D-sub

• Event In

• Supported on Lemo

• USB

• USB v2.0 (Supports USB-PD charging)

• Ethernet

• Through a multi-port adaptor

• Wi-Fi

• Fully-integrated, fully-sealed 2.4/5 GHz Wi-Fi module

• Simultaneous Access Point (AP) and Client modes

• Bluetooth wireless technology

• Fully-integrated, fully-sealed 2.4 Bluetooth module

• Cellular

• Fully-integrated, fully-sealed LTE compliant module

• Bands 1:2:3:4:5:7:8:12:18:19:20:28

• Network Protocols

• HTTP (web browser GUI) HTTP, HTTPS

• NTP Server Yes

• TCP/IP or UDP Yes

• NTRIP NTRIP v1 and v2, Client Server and Caster modes

• mDNS/uPnP Service discovery Yes

• Dynamic DNS Yes

• Email alerts Yes

• Cellular Support

• Internet-based correction streams (IBSS, VRS, NTRIP):

• Internal LTE modem

• Connected smartphone

• Connected C

• Remote access

• Using DynDNS and appropriate service

• Supported Data Formats

• Correction inputs

• CMRx, CMR+, CMR, RTCM 2.x, RTCM 3

• RTCM 2.x, CMR, CMR+, CMRx, RTCM 3

• Correction outputs

• RTCM 2.x, CMR, CMR+, CMRx, RTCM 3

• Data outputs

• NMEA 0183, GSOF, 1PPS Time Tags

CLIN 0002: GPS UFH Radio/Qty: 1 – UHF Radio to relay corrected data from the GPS Base Station to the GPS Field Rover — Trimble 450H Radio, MFR 74451-96 (or Equal)

To be considered “equal”, offered products must meet the following salient functional, physical and performance characteristics:

• Compatible with Trimble 5800 Antenna/Radio, MFR 53618-42

• Support all aspects of GNSS surveying

• Configurable options and rugged reliability

• Wireless UHF data radio

• Full function user interface

• High over-the-air link rate

• User defined power levels from 2 W to 35 W

• 410 MHz to 430 MHz bandwidth

• Software-controlled Channel Bandwidth

• Can be used as a repeater

• 1 RS-232 port, 115.2 kbps maximum

• Navigation buttons, LCD display

• Power

• External

• 11.0 V DC to 16.0 V DC, 15 Amp maximum

• During RX

• 1.7 W nominal @ 12.0 V DC

• During TX

• 115 W nominal @ 12.0 V DC, 35 W RF Output

• 45 W nominal @ 12.0 V DC, 8 W RF Output

• 25 W nominal @ 12.0 V DC, 2 W RF Output

• Modem Specifications

• Link Rate/Modulation

• 19,200 bps/4FSK, 9600 bps/4FSK, 19,200 bps/GMSK, 16,000 bps/GMSK, 9600 bps/GMSK, 8000 bps/GMSK, 4800 bps/GMSK

• Link Protocols

• Transparent EOT/EOC/FST, Packet-Switched, TRIMMARK, TRIMTALK, TT450S

(HW), SATEL

• Forward Error Correction: Yes

• Radio Specifications

• Frequency Bands

• 390 MHz to 430 MHz and 430 MHz to 473 MHz

• Frequency Control

• Synthesized 6.25 kHz tuning resolution; Frequency stability

± 1 ppm –40 °C to +85 °C (–40 °F to +185 °F)

• RF Transmitter Output

• Programmable from 2 W to 35 W (where permitted)

• Sensitivity

• 110 dBm BER 10

• Type Certification

• Models accepted to be certified for operation in the U.S., Europe, Australia, New Zealand, Brazil, and Canada.

• Environmental Specifications

• Enclosure

• IP67 (Dustproof and watertight to depth of 1 m for 30 minutes)

• Operating Temperature (receiver)

• -30°C to 65°C (-22°F to +149°F)

• Operating Temperature (transmitter)

• -30°C to 65°C (-22°F to +149°F)

• Storage Temperature

• -30°C to 85°C (-22°F to +185°F)

• Vibration

• MIL-STD-810F

• Mechanical Specifications

• Dimensions

• 11.9 cm L x 8.6 cm W x 21.3 cm H with handle

• (4.7 in L x 3.4 in W x 8.37 in H with handle)

• Weight (approximate)

• 1.95 kg (4.3 lb)

• Data/Power Connector

• - 5-pin, #1-shell LEMO

• RF Connector

• 50 Ohm, TNC female

3. Inherent Services: The installation of the Transmitter/Receiver Unit and UHF Radio is included in the quote and will be provided by the vendor.

4. Delivery: The equipment will replace the Base Station on the third floor of Building 30, 6 CES HQ and will be delivered by either UPS, FED-EX, DHL, or POSTAGE to Building 11.

5. Terms and Conditions: The Transmitter/Receiver Unit and UHF Radio each have a one year warranty.