MOBILE GRAVIMETER CHEKAN-AM

Anton Krasnov Concern CSRI Elektropribor, JSC St-Petersburg, Russia

Chekan-AM First Airborne Measurements

Joint Trials with Institute of Flight Guidance, Braunschweig, Germany February 2007

Dornier-128 Aircraft Speed 50 m/s. Altitude 300 m

Magdeburg Gravity Anomaly

2/20

Chekan-AM Hardware

3/20

Air-Sea Gravimeter CHEKAN-AM: - Double quartz elastic system - Two-axis gyrostabilizer

- Integration with GNSS

Model SHELF-E. Features: - High accuracy – 0.4 mGal (RMS) - Low drift – 0.5 mGal/day

- Low power consumption – 250 W

2003 2013

Gravity Sensor. Principle of Operation

4/20

Double Quartz Elastic System (DQES) in Damping Liquid

Optoelectronic Converter with two CCDs in Chekan-AM / one CMOS-camera in Shelf-E

DQES sensitivity: 0.5 arc sec / mGal

Range: 10 Gal

Gravity Sensor

5/20 Chekan-AM

DQES DQES

Shelf-E

Two-Axis Gyroplatform

6/20

• Two Float-Integrated Gyros

• Two Accelerometers

• Azimuth Fiber-Optic Gyro

• Gearless Servo Drive System

• Digital Controllers

Gyroplatform Leveling Loop

7/20

g – gravity R – Earth average radius w – horizontal acceleration

Ω cosφ – Earth rotation V – velocity α – stabilization error

Bench Tests. Drift

8/20

Shelf-E

Chekan-AM

С=0.2 mGal/day

Time, Day

∆g, mGal

Bench Tests. Temperature Stability

9/20

5°С 10°С 15°С 20°С 25°С

Chekan-AM

Shelf-E

Time, h

∆g, mGal

Bench Tests. Sensitivity

10/20 Time, Day

mGal

calculated tide

measurements

Real-Time Software

11/20

Flowchart of Data Processing

12/20

Quality Control

13/20

Publications

14/20

http://www.gravionic.com/references.html

http://www.gfz-potsdam.de/en/section/global-geomonitoring-and-gravity-field/topics/terrestrial-and-airborne-gravimetry/geohalo/

http://orbit.dtu.dk/en/publications

http://www.springer.com/engineering/mechanical+engineering/journal/13140

Surveys Conducted by TGS-NOPEC

15/20

Surveys Conducted by TGS-NOPEC

16/20

Shipborne Survey in the Arctic Basin

17/20

Total distance – 12 000 km,

7500 km – in ice

Research vessel Akademik Fyodorov

Icebreaker Yamal

North Pole

Airborne Survey in the Arctic Basin

18/20

East Siberian Sea

Aircraft AN-30

Flight altitude: 350 m

Speed: 75-100 m/s

4 km

25 km

Airborne Survey in the Arctic Basin

19/20

April – August 2015 RMS:

Total distance: 40 000 km 0.69 mGal (Shelf-E)

Reference station: Pevek (Russia) 0.85 mGal (Chekan-AM ser.#14)

120 profiles 0.83 mGal (Chekan-AM ser.#31)

1300 cross-points

Survey in the Arctic Basin

20/20

133 cross-points

Mean value: 1.3 mGal

Thank you for your attention!

Anton Krasnov

Concern CSRI Elektropribor, JSC

anton-krasnov@mail.ru