# Filename: NOAA_LSA_PODS.Arc.Surface_Roughness.v01.20140313.10km.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
2014-03-13 12:21:47,82.499198766,-59.266302446,0.07,0.18,0.04,0.05,0.09,0.11,0.14
2014-03-13 12:23:07,82.560719174,-58.755868519,0.07,0.30,0.04,0.05,0.09,0.14,0.24
2014-03-13 12:24:26,82.621412104,-58.234914684,0.18,0.64,0.05,0.08,0.25,0.42,0.55
2014-03-13 12:25:45,82.681175817,-57.707083268,0.20,0.55,0.06,0.11,0.28,0.39,0.44
2014-03-13 12:27:04,82.740088651,-57.172930452,0.29,0.68,0.14,0.20,0.36,0.50,0.56
2014-03-13 12:28:23,82.798388755,-56.629937633,0.17,0.58,0.05,0.08,0.25,0.38,0.44
2014-03-13 12:29:42,82.856140388,-56.078861444,0.23,0.65,0.10,0.15,0.28,0.41,0.50
2014-03-13 12:31:00,82.913175573,-55.518562966,0.17,0.59,0.04,0.05,0.24,0.41,0.52
2014-03-13 12:32:18,82.969530031,-54.949281265,0.18,0.71,0.05,0.09,0.23,0.41,0.54
2014-03-13 12:33:37,83.025206795,-54.371024419,0.27,0.84,0.10,0.19,0.34,0.46,0.55
2014-03-13 12:34:57,83.080128726,-53.783317394,0.23,0.75,0.11,0.16,0.27,0.42,0.61
2014-03-13 12:36:16,83.134374086,-53.186667108,0.25,0.78,0.08,0.18,0.32,0.42,0.50
2014-03-13 12:37:36,83.187815776,-52.580293303,0.25,0.84,0.11,0.17,0.32,0.44,0.58
2014-03-13 12:38:55,83.24052317,-51.964655245,0.24,0.63,0.11,0.17,0.29,0.43,0.52
2014-03-13 12:40:15,83.292417848,-51.339277134,0.28,0.72,0.13,0.20,0.36,0.48,0.60
2014-03-13 12:41:35,83.343531075,-50.704404666,0.32,0.63,0.15,0.24,0.39,0.52,0.59
2014-03-13 12:42:54,83.393752961,-50.059430127,0.29,0.75,0.14,0.21,0.36,0.47,0.59
2014-03-13 12:44:13,83.443237772,-49.405310776,0.31,0.64,0.14,0.23,0.38,0.47,0.55
2014-03-13 12:45:32,83.491812093,-48.741081957,0.34,0.70,0.19,0.27,0.40,0.52,0.59
2014-03-13 12:46:50,83.539494416,-48.066927648,0.34,0.67,0.13,0.27,0.42,0.50,0.58
2014-03-13 12:48:08,83.586297744,-47.383003355,0.38,0.94,0.19,0.29,0.45,0.66,0.85
2014-03-13 12:49:25,83.632199733,-46.689263914,0.34,0.66,0.19,0.27,0.40,0.50,0.58
2014-03-13 12:50:42,83.677092501,-45.985238631,0.33,0.69,0.13,0.25,0.41,0.53,0.61
2014-03-13 12:51:59,83.721079319,-45.271575584,0.31,0.75,0.16,0.22,0.38,0.53,0.63
2014-03-13 12:53:15,83.764091702,-44.548008638,0.30,0.75,0.13,0.22,0.36,0.53,0.62
2014-03-13 12:54:32,83.806115426,-43.814606588,0.31,0.67,0.14,0.22,0.40,0.50,0.56
2014-03-13 12:55:48,83.847063201,-43.071086608,0.28,0.71,0.11,0.19,0.36,0.48,0.56
2014-03-13 12:57:04,83.887045327,-42.318123916,0.29,0.62,0.14,0.22,0.35,0.45,0.54
2014-03-13 12:58:16,83.923861019,-41.5963102655,0.28,0.65,0.12,0.20,0.34,0.50,0.61
2014-03-13 13:03:45,84.195830551,-39.66801525,0.25,0.82,0.11,0.18,0.32,0.44,0.54
2014-03-13 13:05:11,84.289589374,-39.504180513,0.27,0.79,0.09,0.16,0.35,0.52,0.67
2014-03-13 13:06:32,84.378059635,-39.339926327,0.27,0.73,0.11,0.17,0.33,0.49,0.64
2014-03-13 13:07:53,84.466411699,-39.172879267,0.19,0.63,0.08,0.12,0.23,0.37,0.49
2014-03-13 13:09:15,84.554700114,-38.999587615,0.16,0.73,0.07,0.10,0.20,0.32,0.49
2014-03-13 13:10:38,84.642944662,-38.821032591,0.20,0.78,0.08,0.11,0.26,0.41,0.58
2014-03-13 13:12:02,84.731133553,-38.636301247,0.21,0.74,0.08,0.15,0.26,0.40,0.49
2014-03-13 13:13:25,84.819268919,-38.445494933,0.19,0.48,0.08,0.14,0.22,0.32,0.42
2014-03-13 13:14:50,84.907348006,-38.248278327,0.19,0.64,0.09,0.13,0.23,0.35,0.43
2014-03-13 13:16:14,84.99535838,-38.043783927,0.21,0.64,0.10,0.15,0.25,0.38,0.49
2014-03-13 13:17:38,85.083305423,-37.832159734,0.25,0.60,0.11,0.19,0.31,0.42,0.51
2014-03-13 13:19:01,85.17118786,-37.61303618,0.22,0.65,0.09,0.15,0.27,0.41,0.52
2014-03-13 13:20:24,85.258987434,-37.385271617,0.19,0.51,0.10,0.14,0.23,0.33,0.44
2014-03-13 13:21:47,85.346726037,-37.149851237,0.22,0.62,0.09,0.15,0.27,0.44,0.52
2014-03-13 13:23:09,85.434369501,-36.904650964,0.17,0.47,0.08,0.12,0.22,0.31,0.42
2014-03-13 13:24:32,85.521925982,-36.649837954,0.21,0.66,0.08,0.11,0.27,0.42,0.50
2014-03-13 13:25:54,85.609401773,-36.385447995,0.22,0.71,0.08,0.14,0.27,0.42,0.54
2014-03-13 13:27:17,85.69676821,-36.10968035,0.24,0.67,0.10,0.18,0.30,0.40,0.52
2014-03-13 13:28:40,85.784041465,-35.823090155,0.18,0.68,0.07,0.12,0.23,0.38,0.48
2014-03-13 13:30:02,85.87120376,-35.524363825,0.14,0.46,0.07,0.09,0.18,0.26,0.37
2014-03-13 13:31:25,85.958234422,-35.212021882,0.19,0.48,0.08,0.11,0.25,0.35,0.41
2014-03-13 13:32:48,86.045154153,-34.886623958,0.21,0.63,0.07,0.14,0.27,0.43,0.52
2014-03-13 13:34:11,86.131938008,-34.546487135,0.22,0.73,0.10,0.15,0.28,0.41,0.56
2014-03-13 13:35:34,86.218577674,-34.190670671,0.21,0.61,0.09,0.14,0.26,0.36,0.49
2014-03-13 13:36:57,86.305076348,-33.818847913,0.16,0.62,0.08,0.11,0.18,0.29,0.43
2014-03-13 13:38:19,86.391397567,-33.428387996,0.15,0.49,0.08,0.10,0.17,0.28,0.35
2014-03-13 13:39:42,86.477554377,-33.019417634,0.16,0.53,0.08,0.11,0.20,0.29,0.37
2014-03-13 13:41:06,86.56351351,-32.589465576,0.19,0.61,0.08,0.12,0.23,0.37,0.52
2014-03-13 13:42:29,86.649259344,-32.136958984,0.24,0.56,0.13,0.18,0.29,0.39,0.49
2014-03-13 13:43:57,86.739148515,-31.636405316,0.22,0.53,0.11,0.16,0.26,0.34,0.40
2014-03-13 13:45:33,86.8359583239,-31.0650692388,0.19,0.43,0.10,0.14,0.23,0.31,0.34
2014-03-13 13:51:17,86.736926939,-29.184023812,0.19,0.58,0.08,0.13,0.22,0.34,0.42
2014-03-13 13:52:35,86.648128041,-28.943067742,0.20,0.51,0.09,0.14,0.25,0.33,0.38
2014-03-13 13:53:52,86.559348221,-28.711707844,0.18,0.44,0.08,0.12,0.23,0.31,0.35
2014-03-13 13:55:09,86.470513335,-28.492197879,0.23,0.54,0.11,0.17,0.27,0.39,0.47
2014-03-13 13:56:27,86.381637429,-28.282623536,0.25,0.78,0.10,0.18,0.31,0.41,0.50
2014-03-13 13:57:44,86.292715954,-28.083075985,0.26,0.64,0.13,0.19,0.30,0.43,0.53
2014-03-13 13:59:02,86.203740875,-27.893926097,0.17,0.40,0.09,0.12,0.20,0.29,0.35
2014-03-13 14:00:19,86.114733694,-27.712652786,0.23,0.50,0.12,0.17,0.29,0.40,0.46
2014-03-13 14:01:37,86.025689325,-27.539536159,0.17,0.42,0.08,0.13,0.21,0.29,0.36
2014-03-13 14:02:55,85.936607497,-27.374367551,0.17,0.45,0.09,0.12,0.21,0.30,0.37
2014-03-13 14:04:12,85.847494736,-27.216092282,0.22,0.57,0.12,0.16,0.26,0.36,0.46
2014-03-13 14:05:30,85.758352725,-27.064275948,0.23,0.50,0.12,0.18,0.28,0.40,0.48
2014-03-13 14:06:48,85.669179842,-26.918993733,0.18,0.48,0.09,0.13,0.21,0.32,0.41
2014-03-13 14:08:05,85.579983133,-26.77928886,0.18,0.49,0.08,0.13,0.23,0.33,0.39
2014-03-13 14:09:23,85.490764847,-26.64476591,0.20,0.74,0.08,0.13,0.26,0.39,0.52
2014-03-13 14:10:41,85.401515312,-26.516328599,0.21,0.64,0.10,0.15,0.25,0.37,0.44
2014-03-13 14:11:58,85.312243718,-26.392611453,0.20,0.55,0.08,0.14,0.25,0.35,0.44
2014-03-13 14:13:16,85.222956262,-26.272967497,0.21,0.56,0.09,0.14,0.26,0.37,0.47
2014-03-13 14:14:34,85.13364763,-26.157855714,0.18,0.50,0.08,0.12,0.22,0.33,0.42
2014-03-13 14:15:51,85.044315381,-26.047465833,0.17,0.75,0.07,0.10,0.22,0.35,0.45
2014-03-13 14:17:09,84.954973325,-25.940122796,0.19,0.63,0.08,0.12,0.25,0.37,0.53
2014-03-13 14:18:26,84.86561457,-25.836361817,0.21,0.71,0.08,0.14,0.27,0.40,0.48
2014-03-13 14:19:43,84.77623128,-25.73707734,0.16,0.59,0.07,0.10,0.21,0.28,0.36
2014-03-13 14:21:00,84.686836958,-25.640714062,0.18,0.57,0.07,0.10,0.23,0.38,0.49
2014-03-13 14:22:17,84.597432714,-25.547071628,0.15,0.71,0.08,0.10,0.18,0.27,0.42
2014-03-13 14:23:34,84.508011746,-25.456954581,0.18,0.44,0.09,0.12,0.22,0.29,0.39
2014-03-13 14:24:52,84.418576323,-25.369676336,0.18,0.66,0.07,0.12,0.23,0.36,0.47
2014-03-13 14:26:09,84.329126938,-25.285228295,0.22,0.69,0.11,0.16,0.27,0.38,0.46
2014-03-13 14:27:26,84.239668521,-25.203114142,0.16,0.49,0.08,0.10,0.20,0.27,0.36
2014-03-13 14:28:14,84.1840406667,-25.1560681605,0.12,0.38,0.07,0.08,0.11,0.29,0.35
2014-03-13 14:34:32,84.190916032,-23.644120216,0.16,0.56,0.08,0.11,0.19,0.25,0.33
2014-03-13 14:35:53,84.263447287,-23.101362217,0.19,0.54,0.08,0.14,0.23,0.34,0.42
2014-03-13 14:37:14,84.335053923,-22.546096443,0.24,0.58,0.08,0.15,0.32,0.42,0.52
2014-03-13 14:38:34,84.405682243,-21.980200071,0.19,0.51,0.08,0.14,0.24,0.34,0.42
2014-03-13 14:39:54,84.475773715,-21.400196991,0.19,0.57,0.10,0.13,0.23,0.35,0.41
2014-03-13 14:41:14,84.545264036,-20.805092254,0.15,0.54,0.07,0.10,0.20,0.28,0.36
2014-03-13 14:42:34,84.614167848,-20.194922727,0.20,0.50,0.08,0.13,0.25,0.35,0.45
2014-03-13 14:43:55,84.682447485,-19.569041546,0.15,0.43,0.09,0.11,0.19,0.26,0.33
2014-03-13 14:45:16,84.750074536,-18.92691946,0.16,0.56,0.08,0.11,0.20,0.29,0.36
2014-03-13 14:46:37,84.816983065,-18.267613654,0.15,0.43,0.08,0.10,0.18,0.26,0.34
2014-03-13 14:47:57,84.883197108,-17.591275634,0.16,0.47,0.08,0.11,0.21,0.30,0.39
2014-03-13 14:49:18,84.948725445,-16.897864162,0.13,0.46,0.07,0.10,0.15,0.22,0.30
2014-03-13 14:50:39,85.013477547,-16.186106871,0.17,0.46,0.09,0.12,0.20,0.33,0.40
2014-03-13 14:52:00,85.077478344,-15.456192497,0.17,0.46,0.08,0.12,0.20,0.32,0.39
2014-03-13 14:53:20,85.140665504,-14.707248379,0.19,0.65,0.09,0.14,0.22,0.32,0.50
2014-03-13 14:54:41,85.20297102,-13.93837556,0.15,0.45,0.07,0.10,0.19,0.30,0.39
2014-03-13 14:56:01,85.264386542,-13.149382682,0.16,0.81,0.09,0.12,0.19,0.27,0.48
2014-03-13 14:57:22,85.324930464,-12.340353047,0.20,0.56,0.09,0.14,0.25,0.39,0.49
2014-03-13 14:58:42,85.384463646,-11.509670799,0.12,0.39,0.07,0.09,0.14,0.20,0.29
2014-03-13 15:00:03,85.443023891,-10.657705657,0.21,0.46,0.08,0.15,0.27,0.35,0.39
2014-03-13 15:01:23,85.500546727,-9.783726543,0.20,0.54,0.09,0.14,0.24,0.33,0.40
2014-03-13 15:02:44,85.556999005,-8.887363792,0.12,0.33,0.05,0.07,0.16,0.21,0.25
2014-03-13 15:04:04,85.612400461,-7.968791061,0.12,0.37,0.05,0.08,0.14,0.20,0.29
2014-03-13 15:05:25,85.66657477,-7.026285155,0.15,0.51,0.07,0.10,0.18,0.27,0.38
2014-03-13 15:06:45,85.719604877,-6.060745451,0.10,0.36,0.04,0.04,0.14,0.26,0.34
2014-03-13 15:08:04,85.771334155,-5.070761615,0.14,0.45,0.04,0.09,0.18,0.24,0.32
2014-03-13 15:09:30,85.8250776213,-3.98859095851,0.16,0.39,0.07,0.11,0.21,0.28,0.32
2014-03-13 15:17:48,85.675645977,-3.519272025,0.15,0.35,0.08,0.10,0.18,0.26,0.32
2014-03-13 15:19:12,85.60312649,-4.216574031,0.13,0.43,0.06,0.09,0.16,0.22,0.26
2014-03-13 15:20:36,85.52995943,-4.89082924,0.15,0.52,0.06,0.11,0.18,0.30,0.41
2014-03-13 15:22:00,85.456199004,-5.543375473,0.16,0.45,0.06,0.11,0.20,0.28,0.37
2014-03-13 15:23:24,85.38188556,-6.175353134,0.13,0.44,0.06,0.08,0.16,0.28,0.33
2014-03-13 15:24:47,85.30698504,-6.786421299,0.14,0.44,0.06,0.09,0.17,0.25,0.38
2014-03-13 15:26:09,85.231610318,-7.379023895,0.13,0.31,0.07,0.10,0.16,0.21,0.25
2014-03-13 15:27:30,85.155735473,-7.953003015,0.16,0.36,0.07,0.11,0.19,0.27,0.31
2014-03-13 15:28:50,85.079352399,-8.508518568,0.16,0.40,0.06,0.08,0.21,0.29,0.34
2014-03-13 15:30:10,85.0025707697,-9.047986255,0.20,0.55,0.07,0.14,0.25,0.34,0.44
2014-03-13 15:31:31,84.925351357,-9.570903027,0.17,0.64,0.05,0.08,0.23,0.41,0.51
2014-03-13 15:32:52,84.847718531,-10.078037547,0.17,0.48,0.08,0.12,0.22,0.30,0.35
2014-03-13 15:34:13,84.769699909,-10.570182539,0.13,0.43,0.07,0.09,0.17,0.24,0.30
2014-03-13 15:35:34,84.69131658,-11.048000893,0.14,0.51,0.06,0.09,0.17,0.25,0.36
2014-03-13 15:36:54,84.612548348,-11.511384204,0.15,0.34,0.06,0.11,0.18,0.26,0.31
2014-03-13 15:38:13,84.533476742,-11.962157893,0.17,0.52,0.09,0.12,0.21,0.33,0.41
2014-03-13 15:39:33,84.454037711,-12.399277897,0.17,0.49,0.09,0.12,0.21,0.30,0.38
2014-03-13 15:40:54,84.374308735,-12.824492755,0.16,0.44,0.08,0.12,0.20,0.30,0.39
2014-03-13 15:42:14,84.294251331,-13.237243087,0.15,0.37,0.08,0.11,0.18,0.27,0.31
2014-03-13 15:43:34,84.213945433,-13.63936196,0.19,0.53,0.09,0.14,0.23,0.31,0.39
2014-03-13 15:44:54,84.133356048,-14.030329356,0.16,0.47,0.09,0.12,0.19,0.26,0.35
2014-03-13 15:46:14,84.052505213,-14.410764566,0.17,0.49,0.08,0.12,0.21,0.30,0.38
2014-03-13 15:47:34,83.971400377,-14.780994465,0.15,0.38,0.07,0.11,0.17,0.25,0.31
2014-03-13 15:48:54,83.890039844,-15.141151641,0.14,0.42,0.07,0.09,0.17,0.25,0.31
2014-03-13 15:50:13,83.808451911,-15.492014151,0.16,0.50,0.08,0.12,0.20,0.30,0.41
2014-03-13 15:51:32,83.726640404,-15.83378463,0.15,0.71,0.08,0.11,0.17,0.26,0.42
2014-03-13 15:52:52,83.644630053,-16.16711878,0.10,0.29,0.06,0.07,0.12,0.19,0.23
2014-03-13 15:54:10,83.562404935,-16.491835918,0.17,0.53,0.08,0.11,0.22,0.32,0.38
2014-03-13 15:55:29,83.479968504,-16.808155341,0.15,0.48,0.04,0.09,0.20,0.28,0.34
2014-03-13 15:56:47,83.397322255,-17.116255319,0.21,0.61,0.08,0.16,0.26,0.35,0.42
2014-03-13 15:58:04,83.314527503,-17.417495005,0.23,0.86,0.11,0.16,0.28,0.42,0.58
2014-03-13 15:59:21,83.231527215,-17.710831916,0.19,0.49,0.09,0.13,0.23,0.33,0.41
2014-03-13 16:00:38,83.148377759,-17.997540965,0.24,0.59,0.09,0.16,0.32,0.43,0.51
2014-03-13 16:01:55,83.065049609,-18.277115173,0.22,0.77,0.10,0.15,0.27,0.41,0.58
2014-03-13 16:03:11,82.981571897,-18.550312162,0.27,0.74,0.12,0.20,0.34,0.48,0.62
2014-03-13 16:04:27,82.897949671,-18.817322728,0.30,0.57,0.16,0.22,0.36,0.45,0.51
2014-03-13 16:05:44,82.814216075,-19.078919634,0.27,0.81,0.09,0.19,0.33,0.44,0.51
2014-03-13 16:07:04,82.730287447,-19.333468681,0.21,0.65,0.11,0.14,0.25,0.36,0.53
2014-03-13 16:08:25,82.645491484,-19.584310238,0.28,0.73,0.11,0.20,0.35,0.46,0.55
2014-03-13 16:09:40,82.5669232846,-19.811870255,0.15,0.47,0.07,0.09,0.20,0.29,0.37