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ATLAS-F is a variant of the ATLAS digitizer that was designed following a customer’s request. Compared to standard ATLAS it offers accessible/removable SD and SIM card slots, hot-swappable dual-slot batteries and the repositioning of all the connectors on one side.
The ATLAS-F is easily transportable in flights, the user can take out the batteries and transport them in the cabin. In addition, the dual battery slot is also useful when ATLAS-F is used for long-term monitoring as the batteries can be replaced one by one without turning off the instrument.
The purpose of positioning the connectors on one side is that the cables are easier to keep in order when the instrument is installed in a box and to save space.
ATLAS-F is available with 3,6 or 9 differential input channels for external sensors (optionally 4 or 8 channels).
The instrument is equipped with high-resolution delta-sigma 24bit ADCs, all the channels are synchronized and the sample rate is adjustable up to 1000 sps per channel.
The system memory (up to 1TByte) has two independent recording zones: the ring-buffer zone which is dedicated to continuous sampling, and the triggering zone which is used for event sampling.
ATLAS-F comes with built-in (not removable) memory and a hot-swappable memory on the outside. Its firmware writes both memory banks redundantly. The user can eject the external card and interchange it while the recording is running without affecting the contents of the internal memory.
The data format is MiniSEED.
The built-in GNSS receiver synchronizes the system clock with the absolute time so that a network of several units can be created where all the channels are synchronized.
The instrument can be controlled locally via network connection (LAN or WiFi), and remotely using the integrated 4G modem (optional). The SIM card is in micro format which is accessible to the user from the top panel.
Thanks to the SeedLink protocol, ATLAS-F is compatible with most popular seismic analysis software (Seiscomp3, Antelope, Earthworm).
The large capacity internal back up battery guarantees long term recording in the absence of an external power supply (typically 40hrs). This feature is greatly appreciated by customers because it is like having an integrated UPS, which saves space and money; both the 4G modem and the external sensors’ power supply is backed up by the internal battery.
The power supply ranges from 9 to 28VDC and it can be connected to the electric power network using the power supply adapter included.
ATLAS-F can also be connected directly to a solar panel.
The anodized aluminum (INOX AISI316 option) enclosure is CNC milled, shockproof, vibration-resistant weather-resistant IP67.
ATLAS-F can be used with an accelerometric or a velocimetric sensor.
ATLAS-F is often used in the field of structural monitoring to calculate the resonant frequency of the buildings.
In a typical geophysical monitoring station, ATLAS-F is used with a low-noise force-balance-triaxial accelerometer and with a triaxial velocimeter, both mounted on a concrete slab.
