Swath Data File: tahoe_98_41.0.em1000.mb51 MBIO Data Format ID: 51 Format name: MBF_EMOLDRAW Informal Description: Old Simrad vendor multibeam format Attributes: Simrad EM1000, EM12S, EM12D, and EM121 multibeam sonars, bathymetry, amplitude, and sidescan, 60 beams for EM1000, 81 beams for EM12S/D, 121 beams for EM121, variable pixels, ascii + binary, Simrad. Data Totals: Number of Records: 355 Bathymetry Data (121 beams): Number of Beams: 42955 Number of Good Beams: 16039 37.34% Number of Zero Beams: 26916 62.66% Number of Flagged Beams: 0 0.00% Amplitude Data (121 beams): Number of Beams: 42955 Number of Good Beams: 16039 37.34% Number of Zero Beams: 26916 62.66% Number of Flagged Beams: 0 0.00% Sidescan Data (1024 pixels): Number of Pixels: 363520 Number of Good Pixels: 155199 42.69% Number of Zero Pixels: 0 0.00% Number of Flagged Pixels: 208321 57.31% Navigation Totals: Total Time: 0.0758 hours Total Track Length: 0.9303 km Average Speed: 12.2669 km/hr ( 6.6307 knots) Start of Data: Time: 08 07 1998 21:50:12.520000 JD219 Lon: -119.9452 Lat: 39.1918 Depth: 112.2000 meters Speed: 0.0000 km/hr ( 0.0000 knots) Heading: 168.4000 degrees Sonar Depth: -0.1500 m Sonar Altitude: 112.3500 m End of Data: Time: 08 07 1998 21:54:45.540000 JD219 Lon: -119.9443 Lat: 39.1836 Depth: 251.3800 meters Speed: 12.4035 km/hr ( 6.7046 knots) Heading: 174.7000 degrees Sonar Depth: 0.0000 m Sonar Altitude: 251.3800 m Limits: Minimum Longitude: -119.9502 Maximum Longitude: -119.9406 Minimum Latitude: 39.1831 Maximum Latitude: 39.1920 Minimum Sonar Depth: -0.4300 Maximum Sonar Depth: 0.4500 Minimum Altitude: -0.1500 Maximum Altitude: 259.7500 Minimum Depth: 57.9200 Maximum Depth: 353.8400 Minimum Amplitude: -53.5000 Maximum Amplitude: -7.0000 Minimum Sidescan: -64.0000 Maximum Sidescan: 46.2500 Data Record Type Notices: DN: 355 MB_DATA_DATA (ID=1): survey data DN: 542 MB_DATA_NAV (ID=12): Navigation record Nonfatal Error Notices: EN: 542 MB_ERROR_OTHER (ID=-8): Neither a data record nor a comment record Problem Notices: Coverage Mask: CM dimensions: 10 10 CM: 0 0 1 1 1 1 1 0 0 0 CM: 0 1 1 1 1 1 1 1 0 0 CM: 0 1 1 1 1 1 1 1 0 0 CM: 0 1 1 1 1 1 1 1 0 0 CM: 0 1 1 1 1 1 1 1 1 0 CM: 0 1 1 1 1 1 1 1 1 0 CM: 0 1 1 1 1 1 1 1 1 0 CM: 1 1 1 1 1 1 1 1 1 1 CM: 1 1 1 1 1 1 1 1 1 1 CM: 1 1 1 1 1 1 1 1 1 1