We Make It Easy for You to Simulate the Real World


CAST-GNSS simulation systems provide you with repeatable GNSS RF signals for a wide range of GNSS applications and vehicle types, perfect for use in either the laboratory or the field.

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Precise and Repeatable GNSS RF Signals

In the very dynamic world of GNSS, it is extremely complicated to test new equipment and verify that the integration of new components is working properly. Our tools make your job easier by providing you precise and repeatable GNSS RF testing signals that you can use in the field or in the lab to stimulate military or commercial devices where you only need GNSS signals. Our proprietary multi-frequency, multi-constellation GNSS RF signal generation technology and advanced vehicle trajectory capabilities also enable you to fully program signals and custom tailor parameters to meet your simulation requirements.

Configurable to Meet Your Needs

Our simulators are highly configurable. Depending on your needs, we can set them up to deliver a full constellation of GNSS satellites, with up to 16 satellites in view per constellation signal type for each composite signal RF output element, or to simultaneously provide up to four different constellation types, such as GPS (including Y-Code, SAASM, M-Code AES, and MNSA), Beidou, , QZSS, and GLONASS on each antenna element.

Thanks to our modular design approach, CAST GNSS system configurations are flexible, so we can customize them to meet changing or expanding requirements. In most cases, our GNSS systems can support up to eight additional “elements” of composite RF output per system, each of which we can configure to provide a different vehicle type, trajectory, or modified navigation signal. In addition, you can synchronize multiple CAST systems to maximize robust and flexible simulation environments.

CAST Navigation’s GNSS simulation systems also feature the ability to add a variety of options, including additional signal, inertial, terrain obscuration, and signal interference capabilities, to meet all types of challenging simulation requirements.

GNSS System Features

Provides precise and repeatable GNSS RF signals that can be utilized for testing in a laboratory or field-type environment
Systems are capable of simulating either static or dynamic motion for terrestrial, aquatic, airborne and space-based vehicles
Signal types supported: GPS, BeiDou , GLONASS, QZSS, SBAS
Customizable solutions allow configurations of GNSS signals to meet your requirements

Intuitive GUI

CAST’s comprehensive and intuitive graphical user interface allows you to select a wide variety of vehicle types and simulate both static and dynamic motion profiles. Depending on your simulation requirements, you can choose from airborne, terrestrial, aquatic (including sea state), or space-based orbital vehicles.

Our advanced GUI enables you to define trajectories using either a scenario profile or the vehicle type and constellation parameters, providing a real-time 6-DOF trajectory via an external interface. The system can also generate a motion profile from previously recorded data collected from an external source.

Additionally, you can specify and customize the scenario date and time, location, almanac, ephemeris, atmospheric delays, multipath, spoofing, RF output power levels, antenna gain pattern, vehicle silhouette, data and health flags, and other criteria.

CAST system’s performance evaluation module enables you to compare the raw measurements and filtered data received from the GPS navigation system under test with truth data from your vehicle. This enables you to generate post-test receiver analysis and truth reports that you can archive for future reference.

CAST GNSS Specifications

Output Signal Types

GPS: L1, L2, L2C, L5, C/A-Code, P-Code, Y-Code, SAASM, M-Code AES, M-Code MNSA
BeiDou: BDS-B1L, BDS-B1C
: E1, E5a

Maximum Dynamics

Velocity: > 60,000 m/s
Acceleration: ± 150,000 m/s2
Jerk: ± 150,000 m/s3

Signal Output Levels (Nominal)

GPS: -160 dBW
: -152 dBW
Beidou: -163 dBW
SBAS: -160 dBW

Signal Level Control

Range: ± 30 dB
Resolution: 0.1 dB

L1/L2 Differential Delay

Range: ± 0.3 m
Resolution: < 1 mm

Signal Accuracy

Pseudorange: 1 mm
Pseudorange Rate: 1 mm/s
Delta Pseudorange: 1 mm
Interchannel Bias: < 1 mm
Uncontrolled Bias: < 1 mm
Bias Repeatability (initial): < 1 mm
Bias Stability (operational): < 1 mm

Signal Quality

Spurious: < -45 dBc
Harmonics: < -50 dBc
Reference Oscillator: 10MHz OCXO
Frequency Stability: 3×10-9 per day

System Options

6-DOF Real Time Interface
L2C, L5
Remote Control DLL
Additional Elements
Inertial Interface
Avionics Interfaces

The CAST Navigation Mission

Our primary mission is to understand and deliver powerful GNSS/INS Simulation Systems
that meet or exceed our customers’ expectations. Helping you make the decisions
necessary to improve your company’s products and processes.