Welcome to the Hawai'i Institute of Geophysics and Planetology.
HIGP
School of Ocean and Earth Science and Technology  .  University of Hawai‘i at Mānoa
stripes Personnel Directory

Mark  Rognstad Faculty

Mark Rognstad
Specialist,
HMRG Design Engineer


S. B., Massachusetts Institute of Technology, 1975

Email: markr@soest.hawaii.edu
Office: POST 816B
Phone Number: (808) 956-8712
Fax Number: (808) 956-6530

University of Hawai'i at Manoa
Hawai'i Institute of Geophysics and Planetology
1680 East-West Road, POST 602
Honolulu, HI 96822
USA


Research Interests:
Sonar design and development, Seafloor mapping, Acoustic and optical remote sensing, Digital signal processing

Projects:
I'm working on the next generation of the HAWAII MR1 swath bathymetry/sidescan system, which will feature improved transducer arrays, greater dynamic range electronics, arbitrary transmit waveforms, and beam steering/shaping. Another project is the CEROS synthetic aperture sonar system, that adds the capability of detecting and imaging objects buried beneath the seafloor to the usual bathymetry and backscatter data. This system presently acquires 32 bit data from 32 channels at a 48 kHz rate per channel, for just over 6 Mbytes/sec. We plan to double that data rate in the future, and add the capability of higher frequency operation to the system. I've been involved in the SCAMP submarine-mounted swath bathymetry/sidescan system, and hope to upgrade its performance by utilizing all four transducer rows on each side. I'll also be involved in the acceptance testing and field trials of the multibeam sonar system to be delivered on board the University's new AGOR 26 research vessel.

Relevant Links:

Publications (partial listing):

Lindsay C. J., Lee R. S., Lindsay M. D., Edwards M. H., Rognstad M. R., and Lindsay H. C. (2015) Submersible Hawaiian Aquatic Research Camera System: STEM Initiatives Fostering the Study of Hawaii's Marine Biota using Underwater Time-Lapse Photography. Marine Technology Society. in press <9479>

Edwards M. H., Wilkens R., Cremer M., Davis R. B., DeCarlo E. H., Kelley C. D., Kerby T., and Rognstad M. R. (2015) The Hawaii undersea military munitions assessment. Deep-Sea Res. II. in press <9406>

Edwards M.H., Fornari D.J., Rognstad M.R., Kelley C.D., Mah C.L., Davis L.K., Flores K.R.M., Main E.L., and Bruso N.L. (2015) Time-Lapse Camera Studies of Sea Disposed Chemical Munitions. Journal Deep Sea Research II. in press<9307>

Rognstad M. (2005) The IMI-30: A 30 kHz Imaging and Mapping Instrument. In OCEANS 2005 MTS/IEEE Proceedings, in press.

Rognstad M. and Speed W.G.Rognstad M. and Speed W.G. (2005) The Hawaii Underwater Robot Challenge. In OCEANS 2005 MTS/IEEE Proceedings, in press.

Davis R.B., Edwards M.H., Rognstad M.R., Appelgate T.B., and Chayes D.N. (2001) New tools for processing sidescan and interferometric bathymetry data. Sea Technology.

Cruikshank D.P., Bell J.F., Gaffey M.J., Brown R.H., Howell R., Beerman C., and Rognstad M. The Dark Side of Iapetus, Icarus, 53, 90-104, 1983, HIG 1429


© 2016 Hawai'i Institute of Geophysics & Planetology