# Filename: NOAA_LSA_PODS.Arc.Surface_Roughness.v01.20160504.10km.txt # # Users are free to use the information hosted on this site in their research, provided credit is given to the NOAA National Environmental # Satellite, Data, and Information Service (NESDIS) Center for Satellite Applications and Research (STAR) Laboratory for Satellite Altimetry (LSA). # # Data and images displayed on NOAA/NESDIS/STAR sites are provided for experimental use only and are not official operational NOAA products. More # information is available at: http://www.star.nesdis.noaa.gov/star/productdisclaimer.php # # Data Description: # This data file contains the NOAA / NESDIS / STAR / LSA Polar Ocean Data System (PODS) Arctic Surface Roughness Product. The Arctic Surface Roughness # Product is derived from Airborne Topographic Mapper (ATM) lidar elevation data acquired during annual, low-altitude NASA Operation IceBridge # airborne surveys over Arctic sea ice. IceBridge ATM data were acquired between March and May, 2009 - 2019. # # Due to the conical scanning geometry of the ATM lidar, across-track sampling is non-uniform, with sampling density greatest at the swath edges. To # account for the variation in sample density, ATM elevation data are gridded (See Figure 1 on Data Product Webpage). Each grid cell has an along-track # dimension of 30 m and an across-track dimension that is inversely proportional to the across-track sampling density. The grid configuration optimizes # ATM sample density providing high-resolution measurements of sea ice surface roughness while still containing enough point measurements for robust # statistical calculations. Statistics are computed on the distribution of sea ice surface roughness for 10 km along-track segments, for each aircraft # flight line. # # Citation: # Users are asked to cite the following publication whenever these data are used: # Connor, L., S. Farrell and D. McAdoo (2017), A decadal study of interannual variability in Arctic sea ice freeboard using airborne laser altimetry # (2006-2016), presented at the 2017 IGS International Symposium on Polar Ice, Polar Climate, and Polar Change, Boulder, Colorado, 14-19 Aug. 2017. # # Point of Contact: Laurence.Connor@noaa.gov # # Data Product Webpage: https://www.star.nesdis.noaa.gov/sod/lsa/SeaIce/SeaIceSurfaceRoughness.php # # File format is comma separated ascii text, and columns are as follows: # 1. UTC Time (YYYY-MM-DD HH:MM:SS), associated with average data acquisition time within 10km segment # 2. Latitude (degrees), average of measurements within 10km segment # 3. Longitude (degrees), average of measurements within 10km segment # 4. Mean surface roughness (m), arithmetic mean of all surface roughness measurements in 10km segment # 5. Maximum surface roughness (m), maximum value of surface roughness in 10km segment # 6. Surface roughness 5th percentile (m), 5th percentile height of all surface roughness measurements in 10km segment # 7. Surface roughness 25th percentile (m), 25th percentile height of all surface roughness measurements in 10km segment # 8. Surface roughness 75th percentile (m), 75th percentile height of all surface roughness measurements in 10km segment # 9. Surface roughness 95th percentile (m), 95th percentile height of all surface roughness measurements in 10km segment # 10. Surface roughness 99th percentile (m), 99th percentile height of all surface roughness measurements in 10km segment # # # # # # -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Time, Latitude, Longitude, Mean surface roughness, Maximum surface roughness, Surface roughness 5th percentile, Surface roughness 25th percentile, Surface roughness 75th percentile, Surface roughness 95th percentile, Surface roughness 99th percentile 2016-05-04 12:24:53,80.556877847,-96.9151113,0.24,0.71,0.10,0.14,0.31,0.48,0.61 2016-05-04 12:26:09,80.58722628,-97.431260596,0.25,0.64,0.11,0.16,0.33,0.43,0.52 2016-05-04 12:27:25,80.61669883,-97.95094352,0.34,1.13,0.15,0.22,0.40,0.62,0.87 2016-05-04 12:28:41,80.645825782,-98.472954868,0.34,1.26,0.14,0.25,0.40,0.58,0.70 2016-05-04 12:29:58,80.674009011,-98.998509967,0.33,1.04,0.14,0.24,0.40,0.56,0.71 2016-05-04 12:31:15,80.701546823,-99.526931322,0.28,0.70,0.11,0.20,0.35,0.50,0.61 2016-05-04 12:32:31,80.728196606,-100.058624286,0.26,0.73,0.11,0.17,0.32,0.46,0.59 2016-05-04 12:33:48,80.754117443,-100.593201846,0.26,0.69,0.10,0.18,0.32,0.43,0.53 2016-05-04 12:35:04,80.779150515,-101.130870886,0.24,0.65,0.07,0.14,0.32,0.45,0.58 2016-05-04 12:36:19,80.803535251,-101.671131432,0.29,0.69,0.10,0.20,0.37,0.49,0.57 2016-05-04 12:37:34,80.826787842,-102.214726358,0.28,0.85,0.10,0.17,0.36,0.57,0.78 2016-05-04 12:38:49,80.849515815,-102.760542557,0.22,0.78,0.08,0.13,0.28,0.44,0.59 2016-05-04 12:40:04,80.871538773,-103.308837708,0.22,0.80,0.10,0.14,0.26,0.45,0.68 2016-05-04 12:41:19,80.892419337,-103.860185003,0.24,0.71,0.09,0.14,0.32,0.46,0.59 2016-05-04 12:42:33,80.912593889,-104.413811124,0.22,0.60,0.08,0.13,0.29,0.42,0.51 2016-05-04 12:43:47,80.932061816,-104.969650931,0.28,1.22,0.10,0.17,0.36,0.54,0.73 2016-05-04 12:45:01,80.95049469,-105.528052744,0.21,0.73,0.09,0.13,0.25,0.42,0.55 2016-05-04 12:46:14,80.968088703,-106.088649921,0.26,1.05,0.10,0.17,0.32,0.53,0.78 2016-05-04 12:47:28,80.984981551,-106.651183528,0.28,0.96,0.11,0.17,0.34,0.53,0.72 2016-05-04 12:48:41,81.00078438,-107.216032128,0.24,0.63,0.10,0.16,0.30,0.47,0.56 2016-05-04 12:49:54,81.015888159,-107.782620346,0.19,0.66,0.09,0.13,0.23,0.37,0.48 2016-05-04 12:51:06,81.030040155,-108.351129744,0.29,1.15,0.14,0.21,0.35,0.48,0.64 2016-05-04 12:52:18,81.043519373,-108.92117963,0.22,0.65,0.09,0.16,0.28,0.39,0.51 2016-05-04 12:53:29,81.055943697,-109.493031086,0.24,0.72,0.08,0.14,0.32,0.49,0.57 2016-05-04 12:54:40,81.067453362,-110.066430161,0.20,0.55,0.09,0.13,0.24,0.36,0.48 2016-05-04 12:55:51,81.078384413,-110.641011088,0.25,0.72,0.13,0.17,0.30,0.42,0.52 2016-05-04 12:57:01,81.088053347,-111.217203292,0.24,0.87,0.11,0.16,0.29,0.46,0.64 2016-05-04 12:58:12,81.096967373,-111.794499986,0.26,0.79,0.09,0.16,0.34,0.52,0.63 2016-05-04 12:59:22,81.104959598,-112.372897046,0.20,0.78,0.08,0.13,0.25,0.37,0.45 2016-05-04 13:00:34,81.112140477,-112.952232523,0.26,0.95,0.12,0.18,0.32,0.47,0.73 2016-05-04 13:01:47,81.118326516,-113.532473703,0.23,0.90,0.10,0.15,0.29,0.45,0.59 2016-05-04 13:03:01,81.123733275,-114.113413127,0.24,0.92,0.10,0.16,0.30,0.46,0.62 2016-05-04 13:04:15,81.128362915,-114.694963573,0.25,0.87,0.10,0.15,0.31,0.49,0.64 2016-05-04 13:05:26,81.1315886355,-115.252208272,0.17,0.80,0.03,0.09,0.23,0.38,0.49 2016-05-04 13:06:43,81.1344802456,-115.861667793,0.20,0.61,0.10,0.14,0.24,0.40,0.50 2016-05-04 13:07:55,81.1361017917,-116.436961876,0.16,0.60,0.06,0.11,0.19,0.32,0.49 2016-05-04 13:09:09,81.137122904,-117.025488105,0.23,0.74,0.11,0.16,0.29,0.40,0.54 2016-05-04 13:10:22,81.137071984,-117.608533794,0.21,0.62,0.09,0.13,0.26,0.38,0.50 2016-05-04 13:11:35,81.1360514318,-118.19277316,0.20,0.62,0.10,0.14,0.24,0.37,0.53 2016-05-04 13:12:48,81.133987621,-118.774256748,0.20,0.56,0.10,0.15,0.24,0.35,0.44 2016-05-04 13:14:01,81.131379545,-119.356777804,0.18,0.80,0.06,0.10,0.22,0.39,0.57 2016-05-04 13:15:14,81.1279899705,-119.939051681,0.17,0.61,0.06,0.11,0.21,0.33,0.42 2016-05-04 13:16:26,81.123361554,-120.520467242,0.19,0.53,0.10,0.13,0.23,0.35,0.46 2016-05-04 13:17:39,81.117629166,-121.101254213,0.17,0.50,0.09,0.12,0.21,0.33,0.42 2016-05-04 13:18:51,81.111287743,-121.681376937,0.21,0.52,0.10,0.15,0.26,0.35,0.45 2016-05-04 13:20:03,81.104147011,-122.260669534,0.25,0.62,0.11,0.18,0.30,0.45,0.53 2016-05-04 13:21:15,81.09586845,-122.838833417,0.17,0.54,0.09,0.12,0.20,0.33,0.46 2016-05-04 13:22:27,81.086934182,-123.416049167,0.21,0.68,0.09,0.13,0.26,0.41,0.52 2016-05-04 13:23:39,81.076804856,-123.991825232,0.19,0.52,0.09,0.13,0.24,0.35,0.42 2016-05-04 13:24:51,81.066282258,-124.566653004,0.20,0.78,0.09,0.12,0.26,0.40,0.52 2016-05-04 13:26:06,81.054587048,-125.139818481,0.19,1.00,0.09,0.12,0.21,0.43,0.67 2016-05-04 13:27:22,81.042077094,-125.711504958,0.25,0.73,0.12,0.18,0.30,0.47,0.59 2016-05-04 13:28:38,81.0280658705,-126.291827666,0.22,1.04,0.08,0.15,0.26,0.45,0.68 2016-05-04 13:29:52,81.0140787809,-126.846117555,0.16,0.70,0.05,0.10,0.21,0.31,0.48 2016-05-04 13:31:07,80.999068779,-127.416057922,0.21,0.64,0.08,0.14,0.26,0.38,0.46 2016-05-04 13:32:22,80.9828219629,-127.980270736,0.21,0.62,0.09,0.14,0.26,0.41,0.50 2016-05-04 13:33:36,80.9659436728,-128.542698169,0.23,0.78,0.07,0.16,0.28,0.39,0.53 2016-05-04 13:34:51,80.948194483,-129.102967098,0.21,0.60,0.09,0.15,0.26,0.36,0.47 2016-05-04 13:36:05,80.92966422,-129.66109634,0.20,0.55,0.09,0.14,0.25,0.34,0.43 2016-05-04 13:37:20,80.910184379,-130.216765541,0.19,0.44,0.09,0.14,0.23,0.31,0.39 2016-05-04 13:38:35,80.889926287,-130.770109664,0.20,0.61,0.10,0.13,0.24,0.35,0.43 2016-05-04 13:39:49,80.868817528,-131.320950612,0.21,0.58,0.10,0.14,0.26,0.39,0.49 2016-05-04 13:41:04,80.846854377,-131.869182845,0.19,0.46,0.10,0.14,0.23,0.31,0.37 2016-05-04 13:42:18,80.824000368,-132.414639876,0.17,0.52,0.09,0.12,0.21,0.30,0.37 2016-05-04 13:43:33,80.800550975,-132.957738851,0.15,0.50,0.05,0.07,0.20,0.35,0.41 2016-05-04 13:44:47,80.776044463,-133.497603354,0.17,0.43,0.09,0.13,0.21,0.29,0.36 2016-05-04 13:46:01,80.7508242987,-134.034738573,0.19,0.50,0.10,0.15,0.23,0.31,0.41 2016-05-04 13:47:15,80.724910028,-134.569131457,0.18,0.68,0.05,0.11,0.23,0.32,0.46 2016-05-04 13:48:29,80.6982313302,-135.100583486,0.10,0.44,0.05,0.05,0.13,0.22,0.29 2016-05-04 13:49:43,80.6706017506,-135.628634254,0.18,0.58,0.06,0.09,0.23,0.37,0.47 2016-05-04 13:50:57,80.6422217998,-136.153602205,0.18,0.52,0.06,0.12,0.23,0.33,0.41 2016-05-04 13:52:12,80.6132094476,-136.675659314,0.16,0.51,0.07,0.11,0.19,0.29,0.40 2016-05-04 13:53:26,80.5833813062,-137.19437085,0.18,0.42,0.10,0.15,0.21,0.29,0.35 2016-05-04 13:54:40,80.5527605781,-137.709695438,0.18,0.66,0.08,0.12,0.22,0.33,0.44 2016-05-04 13:55:54,80.521363585,-138.221627264,0.18,0.44,0.10,0.13,0.21,0.30,0.38 2016-05-04 13:57:08,80.4892894035,-138.729844291,0.16,0.51,0.07,0.11,0.20,0.29,0.39 2016-05-04 13:58:23,80.4565006776,-139.235610488,0.17,0.59,0.09,0.12,0.19,0.29,0.38 2016-05-04 13:59:37,80.422985172,-139.737429155,0.18,0.53,0.11,0.14,0.21,0.29,0.42 2016-05-04 14:00:52,80.3888478857,-140.23337827,0.15,0.55,0.05,0.08,0.19,0.31,0.43 2016-05-04 14:02:06,80.3537158117,-140.730266201,0.14,0.39,0.05,0.08,0.20,0.29,0.36 2016-05-04 14:03:21,80.318082637,-141.221472141,0.14,0.55,0.05,0.09,0.18,0.25,0.32 2016-05-04 14:04:36,80.2816245933,-141.708737402,0.14,0.38,0.04,0.05,0.19,0.26,0.32 2016-05-04 14:05:50,80.244606018,-142.192699968,0.16,0.43,0.05,0.12,0.19,0.28,0.36 2016-05-04 14:07:05,80.206901174,-142.672979978,0.08,0.29,0.05,0.05,0.10,0.18,0.25 2016-05-04 14:08:20,80.1685110605,-143.149536312,0.14,0.35,0.05,0.10,0.16,0.22,0.26 2016-05-04 14:09:35,80.1294012254,-143.622220147,0.15,0.39,0.07,0.11,0.17,0.24,0.32 2016-05-04 14:10:50,80.08973208,-144.09144652,0.14,0.55,0.07,0.09,0.16,0.25,0.32 2016-05-04 14:12:05,80.049387946,-144.556849108,0.15,0.47,0.07,0.10,0.19,0.30,0.41 2016-05-04 14:13:20,80.008392725,-145.018479777,0.13,0.48,0.06,0.08,0.17,0.26,0.34 2016-05-04 14:14:35,79.966625666,-145.475918959,0.13,0.32,0.07,0.09,0.17,0.23,0.28 2016-05-04 14:15:50,79.924500398,-145.930383177,0.10,0.31,0.05,0.05,0.12,0.22,0.26 2016-05-04 14:17:05,79.881741902,-146.381017754,0.17,0.56,0.07,0.12,0.21,0.31,0.44 2016-05-04 14:18:19,79.8380670349,-146.826893023,0.08,0.23,0.05,0.06,0.09,0.14,0.18 2016-05-04 14:19:34,79.7941454979,-147.270090017,0.11,0.34,0.05,0.06,0.14,0.24,0.28 2016-05-04 14:20:49,79.7494305035,-147.708851677,0.16,0.52,0.07,0.09,0.21,0.34,0.43 2016-05-04 14:22:04,79.7041422311,-148.143862411,0.13,0.41,0.07,0.09,0.15,0.23,0.28 2016-05-04 14:23:19,79.6581853949,-148.574769461,0.14,0.46,0.06,0.09,0.16,0.26,0.35 2016-05-04 14:24:25,79.6177126748,-148.951144336,0.11,0.32,0.06,0.08,0.12,0.21,0.26 2016-05-04 14:29:26,79.459003132,-149.156074426,0.13,0.39,0.05,0.10,0.16,0.22,0.28 2016-05-04 14:31:30,79.4668240622,-148.428756247,0.10,0.29,0.05,0.07,0.13,0.18,0.24 2016-05-04 14:32:50,79.4556694111,-147.91966189,0.16,0.37,0.08,0.11,0.19,0.26,0.31 2016-05-04 14:34:06,79.443061807,-147.433940665,0.15,0.36,0.08,0.11,0.18,0.24,0.28 2016-05-04 14:35:23,79.429948482,-146.949176256,0.14,0.41,0.08,0.10,0.17,0.25,0.32 2016-05-04 14:36:40,79.416474562,-146.465307509,0.13,0.33,0.06,0.09,0.16,0.23,0.29 2016-05-04 14:37:58,79.401511288,-145.983380765,0.13,0.33,0.06,0.09,0.16,0.24,0.29 2016-05-04 14:39:15,79.386228728,-145.50243583,0.12,0.34,0.06,0.08,0.15,0.21,0.27 2016-05-04 14:40:32,79.370016345,-145.023097245,0.14,0.34,0.08,0.11,0.18,0.24,0.28 2016-05-04 14:41:50,79.35352316,-144.544767019,0.13,0.42,0.07,0.09,0.16,0.23,0.30 2016-05-04 14:43:08,79.335829725,-144.068445531,0.13,0.33,0.07,0.10,0.16,0.21,0.29 2016-05-04 14:44:26,79.3176876881,-143.593407466,0.15,0.45,0.08,0.11,0.18,0.28,0.34 2016-05-04 14:45:44,79.298736126,-143.120108909,0.16,0.34,0.08,0.12,0.19,0.26,0.30 2016-05-04 14:47:03,79.279043801,-142.648532325,0.15,0.44,0.09,0.11,0.17,0.27,0.38 2016-05-04 14:48:22,79.258667089,-142.178667074,0.16,0.44,0.06,0.11,0.21,0.30,0.36 2016-05-04 14:49:41,79.237599493,-141.710578574,0.16,0.35,0.08,0.11,0.20,0.26,0.30 2016-05-04 14:50:55,79.2175339763,-141.277976706,0.16,0.29,0.09,0.12,0.18,0.23,0.26 2016-05-04 14:52:18,79.1941532111,-140.783773049,0.16,0.38,0.07,0.11,0.19,0.28,0.34