Reelektronika produces a range of special eLoran measurement instruments.

The LORADD Time-of-arrival Measurement System (TMS) is a powerful instrument designed to perform detailed complex measurments on the received eLoran signals. 

LORADD -TMS

The LORADD-TMS is a scientific receiver for very accurate Loran surveys. The basic Loran engine in this special receiver is the same as applied in all other LORADD receivers. However, the LORADD-TMS is in addition equipped with a Loran Digital Signal processing platform which is capable to accurately tie the Loran measurements to UTC for proper integration with other navigation equipment (such as a GPS receiver). The LORADD-TMS has a variety of analogue and digital inputs and outputs for accurate time tagging the other sensors connected to the TMS.

The LORADD-TMS is configured to work with an externally connected high-end GPS receiver. The GPS measurements will be interleaved with the Loran measurements and be used to calculate absolute ASF values on the fly.

The TMS is equipped with high-resolution eLoran signal simulator for continuous automatic calibration of the Loran antenna and analogue/digital front-end.

Although the TMS contains a Rubidium clock oscillator, the receiver also accepts external 10 MHz clock reference input and external 1PPS synchronisation pulses.

The following options are available:
- Supply of an external high-end GPS receiver to work with the TMS
- Software option to connect different types or brands of GPS receivers
- Windows analysis software for Loran TOA validation and ASF calculation

LORADD-ASF

The Additional Secondary Factor (ASF) Measurement Unit LORADD-ASF is used to gather measurements for eLoran ASF surveys. The LORADD-ASF is based on Reelektronika’s eLoran technology and consists of a LORADD receiver engine, a digital eLoran signal processing platform, a GPS disciplined Rubidium clock, a GPS receiver and an integrated PC platform for monitoring, rudimentary data analysis and data collection. The LORADD-ASF comes with Reelektronika’s eLoran H-field antenna, a GPS antenna and cables.

Please also refer to the commercial and technical documentation under Product Documentation and Product Manuals.