Date ( Publication )

2011-03-30T17:51:00

Purpose

This sensor garamtees:

- precise measurement of snow-depth in extreme conditions

- additional air-temperature detection feature to measure snow-depth over a wide temperature range

- the powerful ultrasonic impulses emitted by this sensor deliver reliable readings even when there is a difficult reflection ratio, as is the case with fresh snow.

Status

Completed

Maintenance and update frequency

As needed

GEMET ( Theme )

• thermal power plant

Keywords

• SHARE , Network , Station , High Altitude

Keywords ( Place )

• Nepal , Lobuche , Khumbu Valley , Sagarmatha National Park

Keywords ( Theme )

• AWS

Keywords

• snow depth

Use limitation

No conditions apply

Access constraints

Copyright

Other constraints

Character set

UTF8

Topic category

• Climatology, meteorology, atmosphere
• Environment
• Geoscientific information

Supplemental Information

Reference system identifier

EPSG / WGS 84 (EPSG:4326) / 7.4

Topology level

Geometry only

Geometric object type

Point

Geometric object count

1

OnLine resource

Himalayas Reference Site Pyramid Station  

Himalayas Reference Site Pyramid Station

OnLine resource

https://geoportal.mountaingenius.org/portal/index.php/data/  

OnLine resource

https://geoportal.mountaingenius.org/geonetwork/srv/api/records/bf13d759-c3a5-4457-82eb-ad96cfa6506c/attachments/Data%20Usage%20Policy.pdf  

Hierarchy level

Series

Statement

The USH-8 Ultrasonic Snow Depth Sensor by SOMMER is ideal for the reliable measurement of snow-depth in extreme conditions. The sensor’s principle of measurement deals with the transit-time measurement of an ultrasonic pulse. The sensor transmits several energy-charged pulses to the snow cover and subsequently receives its reflected signals. Based upon the required transit time of the ultrasonic signals, the USH-8 sensor calculates the current snow depth. The processing time of the ultrasonic pulses here is enormously influenced by the air temperature. For this reason, the snow depth sensor also possesses integrated temperature compensation.

This takes into account the influence of the air temperature on the processing time of the ultrasonic signals, in the calculation of the snow depth. The calculation takes place in the sensor, so that the output signal provides the already converted snow depth.

USH-8 Specifications:

Snow Depth Measurement

Range of measurement: 0 to 8 m

Minimum distance to the maximum expected snow depth: 1 m

Accuracy: 0,1 % (FS)

Resolution 1 mm

Principle of measurement: Ultrasonic (Frequency 50 kHz; Angle of reflected beam 12°)

Integrated Compensation of the Air Temperature

Temperature sensor: Integrated air-temperature sensor in self-venting radiation shield

Range of measurement: -35 to 60 °C

Resolution: 0,1 °C

Non-linearity: < 0,15 %

Interfaces

Analogue: Snow depth measurement

0/4 - 20 mA signal (configurable)

Resolution: 12 Bit

Max. load: 300 OHM

Digital: Snow depth measurement; air temperature; quality flag

RS 232; serial interface

Protocol: Various ASCII formats

gmd:MD_Metadata

File identifier

bf13d759-c3a5-4457-82eb-ad96cfa6506c   XML

Metadata language

eng

Character set

UTF8

Parent identifier

1802972c-49fa-4ddc-9622-4b50b858d7fd

Hierarchy level

Series

Date stamp

2025-02-07T16:41:17

Metadata standard name

ISO 19115:2003/19139

Metadata standard version

1.0