Time Sync Unit

Overview

The Time Sync Unit TSU1 is designed to bring GPS timing precision into enclosed locations where normal GPS signals are not available.

The TSU1 provides a simulated GPS timing signal that can be connected to Seismic Source products in place of a standard GPS unit. This allows GPS-style timing synchronization inside mines, buildings, basements, parking structures, underground sites, or other locations without a clear view of the sky.

The unit is first placed outside where GPS signals are available. After obtaining a valid GPS lock, the TSU1 synchronizes its internal high-accuracy oscillator to GPS time. It can then be moved indoors or underground while continuing to output timing synchronization signals.

The TSU1 outputs standard NMEA navigation messages and a standard Pulse-Per-Second timing signal, making it suitable for devices, sources, or receivers that require accurate timing.

Features

GPS Timing Indoors or Underground

Provides GPS-style timing synchronization without live GPS reception
Designed for enclosed or underground locations
Useful in mines, buildings, basements, and parking structures
Works anywhere GPS signals are not available

Simulated GPS Timing Output

Connects to SSC products in place of a standard GPS unit
Provides simulated GPS time synchronization
Outputs standard NMEA navigation messages
Outputs standard Pulse-Per-Second timing signal
Provides last known location information

High-Accuracy Internal Clock

Uses a high-accuracy oscillator to maintain timing
Synchronizes internal clock to GPS before deployment
Typical drift less than 30 microseconds over 72 hours
Typical battery life of 72 hours
External battery can be added for extended operation

Simple Operation

Place the unit outside with a clear view of the sky
Allow the TSU1 to obtain GPS lock, typically in about ten minutes
Move the unit indoors or underground after synchronization
Connect sync output to the recorder or SSC equipment
Charge input provided for internal battery charging

Rugged Hardware

Simple lightweight rugged enclosure
Designed for field deployment
Sync output connector for timing synchronization
Charge connector for internal battery
Status indicators for hit, GPS lock, and power

Benefits

Extend GPS Timing to Difficult Locations

TSU1 allows timing synchronization in mines, buildings, basements, parking structures, and other areas where GPS reception is not available.

Maintain Microsecond-Level Timing

Once synchronized, the internal oscillator maintains timing with typical drift of less than 30 microseconds over a 72-hour battery period.

Simplify Underground Acquisition

Equipment that normally requires GPS timing can be operated in enclosed or underground environments using the TSU1 simulated GPS timing signal.

Work with SSC Source and Recording Equipment

The simulated GPS timing output can be used with Seismic Source equipment in place of a standard GPS unit.

Reduce Setup Complexity

The TSU1 only needs an initial outdoor GPS lock before being moved to the enclosed work location.

Support Longer Operations

The internal battery provides typical 72-hour operation, and an external battery can be added for extended use.

Brochure

Time Sync Unit Brochure

Related Applications

TSU1 is used anywhere GPS timing is required but satellite reception is unavailable.

Underground Seismic

Bring GPS-style timing synchronization into mines and underground work areas.

Building and Basement Monitoring

Provide accurate timing for equipment operating inside structures without GPS visibility.

Parking Structure Testing

Use simulated GPS timing for testing and monitoring inside parking structures.

Source and Receiver Synchronization

Provide accurate timing signals to seismic source or receiver equipment.

Large Seismic Operations

Support timing synchronization where normal GPS antennas cannot be used.

Brochure

Time Sync Unit Brochure