# Velocity data for the Mizuho Plateau, East Antarctica # # Data Source: Shuhei TAKAHASHI and others, under JARE (Japanese Antarctic # Research Expeditions) # # Related publications: # # Naruse, Renji (1978). "Studies on the Ice Sheet Flow and Local Mass # Budget in Mizuho Plateau, Antarctica." Contributions from the Institute # of Low Temperature Science 3--54. # # Takahashi, S. (1997). "Sheet 6, Ice Sheet Dynamics". East Queen Maud # Land Enderby Land: Glaciological Folio. 1--7. National Institute of # Polar Research. # # Data acquisition method: # # Positions were measured at two different times using a triangulation # chain survey. The first was done in 1969; the second in 1973-1974. # Quoting from Naruse 1978: # # The triangulation chain stretched along the parallel of 72 # degrees South for a total distance of 250 km between A001 at the # southeast end of the Yamato Mountains and A164 (S240) .... # Composed of 164 stations, the chain formed a series of 162 # traingles .... # # Both the first and the second survey of the triangulation chain # were conducted principally by angle measurements with Wild T2 # theodolites. ... # # With the aim of correcting the accumulation of errors, the # distance was measured with a radiowave distance meter (Cubic # DM-20) and the azimuth was observed by shooting the sun for one # side of every 10 to 15 triangles. ... # # The horizontal vector of ice movement was calculated at each # triangulation station from the difference betwee two geodetic # positions in 1969 and 1973-1974, which were obtained by # net-adjustment. The horizontal displacement delta_S and its # direction beta indicated by the azimuth clockwise from the north # point are given as follows: # # delta_S = sqrt( (p delta_phi)^2 + (q delta_lambda)^2 ) # beta = arctan( q delta_lambda / (p delta_phi) ) # # where delta_phi and delta_lambda are repectively the difference # of the latitudes and that of longitudes of a station between two # measurements in 1969 and 1973-1974, and p and q are the # coefficients of the reference ellipsoid (p is almost constant and # q varies with the latitude of the station). # # The horizontal component of the surface velocity V_h (m/a) is # given by # # V_h = delta_S * 365/N # # where N is the number of days between two observations (1453 <= N # <= 1514).... # # # NOTES # # 1. Unspecified errors are listed as "-1". Errors were reported in # Naruse 1978 only for every tenth station. # #LATITUDE LONGITUDE VELOCITY Azimuth ErrSp ErrBr Date1 Date2 STATION Notes -71.8008333 36.1880556 0.22 335 -1.00 -1.0 1969-12-15 1974-01-15 "A003" 1 -71.8094444 36.2186111 0.33 342 -1.00 -1.0 1969-12-15 1974-01-15 "A004" 1 -71.8066667 36.2702778 0.40 342 0.03 6.2 1969-12-15 1974-01-15 "A005" 1 -71.8294444 36.2872222 0.75 333 -1.00 -1.0 1969-12-15 1974-01-15 "A006" 1 -71.8122222 36.3372222 0.64 329 -1.00 -1.0 1969-12-15 1974-01-15 "A007" 1 -71.8130556 36.2691667 0.45 339 -1.00 -1.0 1969-12-15 1974-01-15 "A008" 1 -71.8158333 36.3316667 0.65 327 -1.00 -1.0 1969-12-15 1974-01-15 "A009" 1 -71.8333333 36.3322222 0.78 323 -1.00 -1.0 1969-12-15 1974-01-15 "A010" 1 -71.8286111 36.3752778 1.03 327 -1.00 -1.0 1969-12-15 1974-01-15 "A011" 1 -71.8405556 36.3697222 0.99 314 -1.00 -1.0 1969-12-15 1974-01-15 "A012" 1 -71.8411111 36.2988889 0.87 314 -1.00 -1.0 1969-12-15 1974-01-15 "A013" 1 -71.8433333 36.3652778 0.90 309 -1.00 -1.0 1969-12-15 1974-01-15 "A014" 1 -71.8625000 36.3883333 1.10 313 0.11 5.8 1969-12-15 1974-01-15 "A015" 1 -71.8463889 36.4452778 1.10 319 -1.00 -1.0 1969-12-15 1974-01-15 "A016" 1 -71.8761111 36.4497222 1.50 322 -1.00 -1.0 1969-12-15 1974-01-15 "A017" 1 -71.8466667 36.5163889 1.80 332 -1.00 -1.0 1969-12-15 1974-01-15 "A018" 1 -71.8644444 36.5744444 2.10 338 -1.00 -1.0 1969-12-15 1974-01-15 "A019" 1 -71.8480556 36.6069444 3.60 348 -1.00 -1.0 1969-12-15 1974-01-15 "A020" 1 -71.8550000 36.6550000 3.70 345 -1.00 -1.0 1969-12-15 1974-01-15 "A021" 1 -71.8347222 36.6486111 4.60 349 -1.00 -1.0 1969-12-15 1974-01-15 "A022" 1 -71.8377778 36.7288889 4.10 348 -1.00 -1.0 1969-12-15 1974-01-15 "A023" 1 -71.8555556 36.7836111 4.10 346 -1.00 -1.0 1969-12-15 1974-01-15 "A024" 1 -71.8419444 36.7950000 4.10 347 0.25 5.2 1969-12-15 1974-01-15 "A025" 1 -71.8625000 36.8333333 4.10 346 -1.00 -1.0 1969-12-15 1974-01-15 "A026" 1 -71.8422222 36.8513889 4.30 343 -1.00 -1.0 1969-12-15 1974-01-15 "A027" 1 -71.8694444 36.9111111 4.10 348 -1.00 -1.0 1969-12-15 1974-01-15 "A028" 1 -71.8511111 36.9500000 4.20 344 -1.00 -1.0 1969-12-15 1974-01-15 "A029" 1 -71.8791667 36.9986111 4.10 353 -1.00 -1.0 1969-12-15 1974-01-15 "A030" 1 -71.8597222 37.0500000 3.80 357 -1.00 -1.0 1969-12-15 1974-01-15 "A031" 1 -71.8847222 37.0822222 4.00 359 -1.00 -1.0 1969-12-15 1974-01-15 "A032" 1 -71.8738889 37.1611111 4.10 6 -1.00 -1.0 1969-12-15 1974-01-15 "A033" 1 -71.8888889 37.1677778 4.20 7 -1.00 -1.0 1969-12-15 1974-01-15 "A034" 1 -71.8866667 37.2022222 4.50 12 0.37 6.4 1969-12-15 1974-01-15 "A035" 1 -71.8966667 37.1988889 4.30 12 -1.00 -1.0 1969-12-15 1974-01-15 "A036" 1 -71.8933333 37.2316667 4.70 15 -1.00 -1.0 1969-12-15 1974-01-15 "A037" 1 -71.9094444 37.2550000 4.60 14 -1.00 -1.0 1969-12-15 1974-01-15 "A038" 1 -71.8930556 37.3402778 5.60 16 -1.00 -1.0 1969-12-15 1974-01-15 "A039" 1 -71.9158333 37.4058333 5.90 14 -1.00 -1.0 1969-12-15 1974-01-15 "A040" 1 -71.8936111 37.4847222 7.10 14 -1.00 -1.0 1969-12-15 1974-01-15 "A041" 1 -71.9138889 37.5655556 7.70 9 -1.00 -1.0 1969-12-15 1974-01-15 "A042" 1 -71.8922222 37.5986111 8.50 10 -1.00 -1.0 1969-12-15 1974-01-15 "A043" 1 -71.9116667 37.6869444 8.50 7 -1.00 -1.0 1969-12-15 1974-01-15 "A044" 1 -71.8897222 37.7672222 9.00 6 0.55 5.4 1969-12-15 1974-01-15 "A045" 1 -71.9091667 37.8188889 8.60 4 -1.00 -1.0 1969-12-15 1974-01-15 "A046" 1 -71.8988889 37.8661111 8.90 4 -1.00 -1.0 1969-12-15 1974-01-15 "A047" 1 -71.9036111 37.9858333 9.60 5 -1.00 -1.0 1969-12-15 1974-01-15 "A049" 1 -71.9083333 38.1391667 11.20 9 -1.00 -1.0 1969-12-15 1974-01-15 "A051" 1 -71.9316667 38.2063889 12.20 10 -1.00 -1.0 1969-12-15 1974-01-15 "A052" 1 -71.9113889 38.2302778 13.30 11 -1.00 -1.0 1969-12-15 1974-01-15 "A053" 1 -71.9277778 38.3255556 14.90 7 -1.00 -1.0 1969-12-15 1974-01-15 "A054" 1 -71.9077778 38.3108333 15.10 9 0.64 3.8 1969-12-15 1974-01-15 "A055" 1 -71.9244444 38.4058333 16.80 6 -1.00 -1.0 1969-12-15 1974-01-15 "A056" 1 -71.8986111 38.4913889 18.10 6 -1.00 -1.0 1969-12-15 1974-01-15 "A057" 1 -71.8944444 38.5897222 18.80 5 -1.00 -1.0 1969-12-15 1974-01-15 "A059" 1 -71.9144444 38.6544444 18.50 3 -1.00 -1.0 1969-12-15 1974-01-15 "A060" 1 -71.9002778 38.7183333 19.20 4 -1.00 -1.0 1969-12-15 1974-01-15 "A061" 1 -71.9225000 38.7900000 19.10 3 -1.00 -1.0 1969-12-15 1974-01-15 "A062" 1 -71.8994444 38.8438889 19.80 3 -1.00 -1.0 1969-12-15 1974-01-15 "A063" 1 -71.9252778 38.8586111 19.40 3 -1.00 -1.0 1969-12-15 1974-01-15 "A064" 1 -71.9044444 38.9491667 20.40 1 0.67 3.0 1969-12-15 1974-01-15 "A065" 1 -71.9258333 39.0108333 20.30 1 -1.00 -1.0 1969-12-15 1974-01-15 "A066" 1 -71.9122222 39.0316667 20.90 1 -1.00 -1.0 1969-12-15 1974-01-15 "A067" 1 -71.9263889 39.1000000 20.50 1 -1.00 -1.0 1969-12-15 1974-01-15 "A068" 1 -71.9077778 39.1719444 21.30 0 -1.00 -1.0 1969-12-15 1974-01-15 "A069" 1 -71.9391667 39.2105556 20.20 2 -1.00 -1.0 1969-12-15 1974-01-15 "A070" 1 -71.9219444 39.2497222 21.00 1 -1.00 -1.0 1969-12-15 1974-01-15 "A071" 1 -71.9391667 39.2838889 20.40 2 -1.00 -1.0 1969-12-15 1974-01-15 "A072" 1 -71.9197222 39.2961111 21.00 1 -1.00 -1.0 1969-12-15 1974-01-15 "A073" 1 -71.9216667 39.3958333 20.70 0 0.73 3.2 1969-12-15 1974-01-15 "A075" 1 -71.9466667 39.4627778 19.80 0 -1.00 -1.0 1969-12-15 1974-01-15 "A076" 1 -71.9244444 39.4747222 20.30 359 -1.00 -1.0 1969-12-15 1974-01-15 "A077" 1 -71.9475000 39.5333333 19.50 359 -1.00 -1.0 1969-12-15 1974-01-15 "A078" 1 -71.9263889 39.5241667 20.20 359 -1.00 -1.0 1969-12-15 1974-01-15 "A079" 1 -71.9513889 39.6094444 19.40 359 -1.00 -1.0 1969-12-15 1974-01-15 "A080" 1 -71.9263889 39.6077778 20.10 359 -1.00 -1.0 1969-12-15 1974-01-15 "A081" 1 -71.9572222 39.6886111 19.10 359 -1.00 -1.0 1969-12-15 1974-01-15 "A082" 1 -71.9333333 39.7641667 19.60 359 -1.00 -1.0 1969-12-15 1974-01-15 "A083" 1 -71.9661111 39.7977778 18.80 359 -1.00 -1.0 1969-12-15 1974-01-15 "A084" 1 -71.9486111 39.8650000 19.30 359 0.76 3.5 1969-12-15 1974-01-15 "A085" 1 -71.9697222 39.8925000 18.90 359 -1.00 -1.0 1969-12-15 1974-01-15 "A086" 1 -71.9447222 39.9483333 19.50 359 -1.00 -1.0 1969-12-15 1974-01-15 "A087" 1 -71.9433333 40.0500000 19.50 358 -1.00 -1.0 1969-12-15 1974-01-15 "A089" 1 -71.9713889 40.1405556 19.10 356 -1.00 -1.0 1969-12-15 1974-01-15 "A090" 1 -71.9702778 40.2652778 18.70 355 -1.00 -1.0 1969-12-15 1974-01-15 "A092" 1 -71.9697222 40.3338889 18.40 355 -1.00 -1.0 1969-12-15 1974-01-15 "A094" 1 -71.9483333 40.4313889 18.50 354 0.80 3.7 1969-12-15 1974-01-15 "A095" 1 -71.9741667 40.4486111 17.80 355 -1.00 -1.0 1969-12-15 1974-01-15 "A096" 1 -71.9502778 40.5169444 18.20 354 -1.00 -1.0 1969-12-15 1974-01-15 "A097" 1 -71.9855556 40.5850000 17.30 355 -1.00 -1.0 1969-12-15 1974-01-15 "A098" 1 -71.9641667 40.6411111 17.90 354 -1.00 -1.0 1969-12-15 1974-01-15 "A099" 1 -71.9883333 40.7144444 17.30 354 -1.00 -1.0 1969-12-15 1974-01-15 "A100" 1 -71.9683333 40.7402778 17.80 353 -1.00 -1.0 1969-12-15 1974-01-15 "A101" 1 -71.9872222 40.8238889 17.40 353 -1.00 -1.0 1969-12-15 1974-01-15 "A102" 1 -71.9725000 40.8630556 17.80 352 -1.00 -1.0 1969-12-15 1974-01-15 "A103" 1 -71.9711111 40.9627778 17.50 352 0.85 3.9 1969-12-15 1974-01-15 "A105" 1 -71.9780556 41.0675000 17.40 352 -1.00 -1.0 1969-12-15 1974-01-15 "A107" 1 -71.9938889 41.1250000 17.10 351 -1.00 -1.0 1969-12-15 1974-01-15 "A108" 1 -71.9780556 41.1672222 17.40 351 -1.00 -1.0 1969-12-15 1974-01-15 "A109" 1 -71.9972222 41.2088889 17.00 351 -1.00 -1.0 1969-12-15 1974-01-15 "A110" 1 -71.9886111 41.2444444 17.10 351 -1.00 -1.0 1969-12-15 1974-01-15 "A111" 1 -71.9988889 41.2511111 17.00 351 -1.00 -1.0 1969-12-15 1974-01-15 "A112" 1 -71.9908333 41.2975000 16.90 351 -1.00 -1.0 1969-12-15 1974-01-15 "A113" 1 -72.0063889 41.3436111 16.70 350 -1.00 -1.0 1969-12-15 1974-01-15 "A114" 1 -72.0000000 41.4077778 16.60 350 0.91 4.3 1969-12-15 1974-01-15 "A115" 1 -72.0122222 41.3911111 16.30 350 -1.00 -1.0 1969-12-15 1974-01-15 "A116" 1 -71.9986111 41.4505556 16.30 350 -1.00 -1.0 1969-12-15 1974-01-15 "A117" 1 -72.0169444 41.4272222 16.10 350 -1.00 -1.0 1969-12-15 1974-01-15 "A118" 1 -72.0244444 41.5533333 15.30 349 -1.00 -1.0 1969-12-15 1974-01-15 "A120" 1 -72.0113889 41.6069444 15.30 349 -1.00 -1.0 1969-12-15 1974-01-15 "A121" 1 -72.0255556 41.5988889 14.90 349 -1.00 -1.0 1969-12-15 1974-01-15 "A122" 1 -72.0083333 41.6461111 15.00 349 -1.00 -1.0 1969-12-15 1974-01-15 "A123" 1 -71.9975000 41.7186111 14.80 349 0.92 4.8 1969-12-15 1974-01-15 "A125" 1 -72.0180556 41.7822222 14.10 351 -1.00 -1.0 1969-12-15 1974-01-15 "A126" 1 -71.9986111 41.7833333 14.60 350 -1.00 -1.0 1969-12-15 1974-01-15 "A127" 1 -72.0141667 41.8341667 14.10 352 -1.00 -1.0 1969-12-15 1974-01-15 "A128" 1 -71.9972222 41.8830556 14.40 351 -1.00 -1.0 1969-12-15 1974-01-15 "A129" 1 -72.0150000 41.9483333 14.00 352 -1.00 -1.0 1969-12-15 1974-01-15 "A130" 1 -71.9986111 41.9991667 14.20 351 -1.00 -1.0 1969-12-15 1974-01-15 "A131" 1 -71.9916667 42.1072222 14.40 349 -1.00 -1.0 1969-12-15 1974-01-15 "A133" 1 -71.9952778 42.1761111 14.40 348 0.94 5.1 1969-12-15 1974-01-15 "A135" 1 -72.0075000 42.2566667 14.40 346 -1.00 -1.0 1969-12-15 1974-01-15 "A138" 1 -71.9991667 42.3558333 14.80 343 -1.00 -1.0 1969-12-15 1974-01-15 "A140" 1 -71.9741667 42.3075000 14.70 344 -1.00 -1.0 1969-12-15 1974-01-15 "A141" 1 -71.9872222 42.4275000 14.80 343 -1.00 -1.0 1969-12-15 1974-01-15 "A142" 1 -71.9819444 42.4772222 14.70 343 -1.00 -1.0 1969-12-15 1974-01-15 "A144" 1 -71.9663889 42.5655556 14.70 343 0.97 5.0 1969-12-15 1974-01-15 "A145" 1 -71.9822222 42.5641667 14.50 344 -1.00 -1.0 1969-12-15 1974-01-15 "A146" 1 -71.9683333 42.6144444 14.50 343 -1.00 -1.0 1969-12-15 1974-01-15 "A147" 1 -71.9944444 42.5950000 14.10 345 -1.00 -1.0 1969-12-15 1974-01-15 "A148" 1 -71.9744444 42.6652778 14.20 344 -1.00 -1.0 1969-12-15 1974-01-15 "A149" 1 -71.9744444 42.7255556 14.10 344 -1.00 -1.0 1969-12-15 1974-01-15 "A151" 1 -72.0138889 42.7761111 13.70 343 -1.00 -1.0 1969-12-15 1974-01-15 "A154" 1 -72.0233333 42.8677778 13.30 341 0.99 5.5 1969-12-15 1974-01-15 "A155" 1 -72.0241667 42.9222222 13.30 338 -1.00 -1.0 1969-12-15 1974-01-15 "A157" 1 -72.0238889 43.0083333 13.40 336 -1.00 -1.0 1969-12-15 1974-01-15 "A159" 1 -72.0022222 43.0591667 13.70 335 -1.00 -1.0 1969-12-15 1974-01-15 "A160" 1 -72.0255556 43.0652778 13.30 336 -1.00 -1.0 1969-12-15 1974-01-15 "A161" 1 -72.0033333 43.1161111 13.60 336 -1.00 -1.0 1969-12-15 1974-01-15 "A162" 1 -72.0255556 43.1241667 13.30 336 -1.00 -1.0 1969-12-15 1974-01-15 "A163" 1 -72.0019444 43.1633333 13.60 336 1.01 5.2 1969-12-15 1974-01-15 "A164" 1