DavisStrait Sep10 * SG183 * Dive index * Mission links * Dive 423 * Log results * Raw log file
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Parameter values: Sort by alphabetical glider order
ID  183 HD_C  9.9999997e-06 ROLL_MIN  330 ALTIM_TOP_TURN_MARGIN  5
MISSION  3 HEADING  -1 ROLL_MAX  3931 ALTIM_TOP_MIN_OBSTACLE  1.8
DIVE  423 ESCAPE_HEADING  100 ROLL_DEG  40 ALTIM_PING_DEPTH  300
N_DIVES  0 ESCAPE_HEADING_DELTA  10 C_ROLL_DIVE  2780 ALTIM_PING_DELTA  50
D_SURF  3 FIX_MISSING_TIMEOUT  5 C_ROLL_CLIMB  2600 ALTIM_FREQUENCY  13
D_FLARE  5 TGT_DEFAULT_LAT  6000 HEAD_ERRBAND  10 ALTIM_PULSE  4
D_TGT  990 TGT_DEFAULT_LON  -5500 ROLL_CNV  0.028270001 ALTIM_SENSITIVITY  4
D_ABORT  1050 TGT_AUTO_DEFAULT  0 ROLL_TIMEOUT  15 XPDR_VALID  3
D_NO_BLEED  50 SM_CC  609.0799 R_PORT_OVSHOOT  34 XPDR_INHIBIT  90
D_BOOST  3 N_FILEKB  4 R_STBD_OVSHOOT  24 INT_PRESSURE_SLOPE  0.0097660003
T_BOOST  0 FILEMGR  2 ROLL_AD_RATE  350 INT_PRESSURE_YINT  -0.89999998
D_FINISH  9 CALL_NDIVES  1 ROLL_MAXERRORS  1 DEEPGLIDER  0
D_PITCH  3 COMM_SEQ  0 ROLL_ADJ_GAIN  2.5 DEEPGLIDERMB  0
D_SAFE  500 PROTOCOL  9 ROLL_ADJ_DBAND  0.029999999 MOTHERBOARD  4
D_CALL  4 N_NOCOMM  1 VBD_MIN  440 DEVICE1  2
SURFACE_URGENCY  10 N_NOSURFACE  0 VBD_MAX  3960 DEVICE2  20
SURFACE_URGENCY_TRY  5 UPLOAD_DIVES_MAX  5 C_VBD  2923 DEVICE3  -1
SURFACE_URGENCY_FORCE  10 CALL_TRIES  3 VBD_DBAND  2 DEVICE4  -1
T_DIVE  330 CALL_WAIT  60 VBD_CNV  -0.24529999 DEVICE5  -1
T_MISSION  400 CAPUPLOAD  0 VBD_TIMEOUT  720 DEVICE6  -1
T_ABORT  1440 CAPMAXSIZE  100000 PITCH_VBD_SHIFT  0.00065 LOGGERS  0
T_TURN  225 HEAPDBG  0 VBD_PUMP_AD_RATE_SURFACE  5 LOGGERDEVICE1  -1
T_TURN_SAMPINT  5 T_GPS  3 VBD_PUMP_AD_RATE_APOGEE  4 LOGGERDEVICE2  -1
T_NO_W  120 N_GPS  20 VBD_BLEED_AD_RATE  8 LOGGERDEVICE3  -1
T_LOITER  0 T_GPS_ALMANAC  0 UNCOM_BLEED  50 LOGGERDEVICE4  -1
USE_BATHY  -3 T_GPS_CHARGE  -8286.4268 VBD_MAXERRORS  1 COMPASS_DEVICE  33
USE_ICE  2 T_RSLEEP  3 CF8_MAXERRORS  20 COMPASS2_DEVICE  117
ICE_FREEZE_MARGIN  0.1 STROBE  0 AH0_24V  150 PHONE_DEVICE  48
D_OFFGRID  250 RAFOS_PEAK_OFFSET  1.5 AH0_10V  100 GPS_DEVICE  32
T_WATCHDOG  10 RAFOS_CORR_THRESH  60 MINV_24V  19 RAFOS_DEVICE  64
RELAUNCH  1 RAFOS_HIT_WINDOW  3600 MINV_10V  8 XPDR_DEVICE  24
APOGEE_PITCH  -5 PITCH_MIN  311 FG_AHR_10V  0 SIM_W  0
MAX_BUOY  150 PITCH_MAX  3850 FG_AHR_24V  0 SIM_PITCH  0
COURSE_BIAS  0 C_PITCH  2475 PHONE_SUPPLY  2 SEABIRD_T_G  0.0043469137
GLIDE_SLOPE  30 PITCH_DBAND  0.1 PRESSURE_YINT  -62.615704 SEABIRD_T_H  0.00062159239
SPEED_FACTOR  1 PITCH_CNV  0.003125763 PRESSURE_SLOPE  0.00012025224 SEABIRD_T_I  2.0014088e-05
RHO  1.0275 P_OVSHOOT  0.039999999 AD7714Ch0Gain  128 SEABIRD_T_J  1.6690842e-06
MASS  51717 PITCH_GAIN  37 TCM_PITCH_OFFSET  0 SEABIRD_C_G  -9.9685602
NAV_MODE  0 PITCH_TIMEOUT  17 TCM_ROLL_OFFSET  0 SEABIRD_C_H  1.1354375
FERRY_MAX  45 PITCH_AD_RATE  160 COMPASS_USE  1 SEABIRD_C_I  -0.0013495153
KALMAN_USE  2 PITCH_MAXERRORS  1 ALTIM_BOTTOM_PING_RANGE  0 SEABIRD_C_J  0.00019269099
HD_A  0.003 PITCH_ADJ_GAIN  0.02 ALTIM_TOP_PING_RANGE  20
HD_B  0.0099999998 PITCH_ADJ_DBAND  1 ALTIM_BOTTOM_TURN_MARGIN  15

Pre-dive calculations and measurements:
GPS1  291110,093606,6654.168,-5816.961,37,1.2,37,-37.8 TGT_NAME  TARGET_E
_CALLS  1 TGT_LATLONG  6703.000,-5648.000
_XMS_NAKs  0 TGT_RADIUS  2000.000
_XMS_TOUTs  0 KALMAN_CONTROL  0.000,0.000
_SM_DEPTHo  1.55 KALMAN_X  0.0,0.0,0.0,0.0,0.0
_SM_ANGLEo  -63.6 KALMAN_Y  0.0,0.0,0.0,0.0,0.0
GPS2  291110,094225,6654.283,-5817.039,11,1.4,28,-37.8 MHEAD_RNG_PITCHd_Wd  113.7,66295,-17.5,-10.000
SPEED_LIMITS  0.173,0.260 D_GRID  896

Post-dive calculations and measurements:
FREEZE  1.14,-1.071,-1.740,2,1,0 ALTIM_TOP_PING  20.0,18.7
FINISH  1.1,1.025557 _24V_AH  21.7,51.529
SM_CCo  17845,222.75,0.601,1,0,439,609.08 _10V_AH  10.0,38.198
SM_GC  1.60,0.00,0.00,222.75,0.000,0.000,0.601,296,2786,439,-6.79,0.17,609.08 FG_AHR_24Vo  0.000
RAFOS_CLK  974 FG_AHR_10Vo  0.000
RAFOS  0,1291032062,12.033333,12.017222,45,45,41,39,39,38,964,1470,1063,842,1594,1263 MEM  151672
RAFOS_FIX  6657.960938,-5813.780762,291110,121200,2,69,0.65 DATA_FILE_SIZE  46606,1316
IRIDIUM_FIX  6620.33,-5815.32,291110,040413 CAP_FILE_SIZE  189173,0
TT8_MAMPS  0.028462 CFSIZE  260165632,219811840
HUMID  46.22 ERRORS  0,0,0,0,0,0,0,0,0,0,0,0,0,1,0
INTERNAL_PRESSURE  8.42653 SOUNDSPEED  1455.3
TCM_TEMP  14.40 GPS  291110,144537,6654.332,-5809.396,28,2.0,29,-37.7
XPDR_PINGS  0

Energy measurements:
devicesecsmAJsensorsecsmAJ
Pitch_motor20257114.62 SBE_CT91824478.11
Roll_motor16974275.91 SBE_O2000.00
VBD_pump_during_apogee37311719499.48 nil000.00
VBD_pump_during_surface2226012906.44 nil000.00
VBD_valve000.00 nil000.00
Iridium_during_init2510357.19 nil000.00
Iridium_during_connect39160135.99 nil000.00
Iridium_during_xfer149223722.38 nil000.00
Transponder_ping342029.62 nil000.00
GUMSTIX_24V000.00
GPS305015.29
TT8333419664.21
LPSleep114592264.70
TT8_Active78719156.78
TT8_Sampling2566391024.53
TT8_CF831545144.75
TT8_Kalman000.00
Analog_circuits206012247.21
GPS_charging000.00
Compass230115345.29
RAFOS2520375.60
Transponder23307.15

Guidance and control:
st_secs pitch_ctl vbd_ctl depth ob_vertv data_pts end_secs pitch_secs roll_secs vbd_secs vbd_i gcphase pitch_i roll_i pitch_ad roll_ad vbd_ad pitch_retries pitch_errors roll_retries roll_errors vbd_retries vbd_errors
12 end surface: CONTROL_FINISHED_OK
state 12 begin dive
15 -0.57 -146.0 0.0 0.0 0 154 0.00 0.00 -136.43 0.000 2 0.000 0.000 278 2783 3232 0 0 0 0 0 0
158 -0.57 -146.0 5.6 -12.6 24 178 8.60 2.35 -5.70 0.000 4 0.257 0.062 2285 1368 3522 0 0 0 0 0 0
190 0.16 -146.0 22.0 -45.2 29 198 0.82 2.35 0.00 0.000 6 0.163 0.063 2519 2777 3524 0 0 0 0 0 0
537 -0.39 -146.0 48.3 -6.0 90 544 0.47 2.25 0.00 0.000 4 0.103 0.048 2350 1369 3525 0 0 0 0 0 0
564 -0.68 -146.0 50.1 -6.6 94 572 0.28 2.78 0.00 0.000 6 0.093 0.061 2250 3044 3525 0 0 0 0 0 0
911 -0.61 -146.0 91.2 -11.9 155 917 0.00 2.70 0.00 0.000 4 0.000 0.051 2250 1374 3524 0 0 0 0 0 0
969 -0.58 -146.0 98.4 -11.2 165 977 0.15 2.75 0.00 0.000 6 0.181 0.064 2288 3012 3524 0 0 0 0 0 0
1304 -0.61 -146.0 127.7 -8.9 197 1308 0.00 2.62 0.00 0.000 4 0.000 0.050 2288 1372 3524 0 0 0 0 0 0
1381 -0.67 -146.0 135.1 -9.3 203 1388 0.00 2.70 0.00 0.000 6 0.000 0.064 2287 2983 3524 0 0 0 0 0 0
1708 -0.72 -146.0 163.7 -8.4 234 1713 0.12 2.60 0.00 0.000 4 0.108 0.051 2235 1371 3523 0 0 0 0 0 0
1808 -0.69 -146.0 175.1 -11.5 242 1815 0.00 2.65 0.00 0.000 6 0.000 0.065 2234 2967 3523 0 0 0 0 0 0
2134 -0.64 -146.0 212.0 -11.1 273 2139 0.12 2.58 0.00 0.000 4 0.190 0.052 2267 1372 3523 0 0 0 0 0 0
2212 -0.68 -146.0 219.7 -8.8 279 2219 0.00 2.62 0.00 0.000 6 0.000 0.064 2266 2940 3523 0 0 0 0 0 0
2537 -0.70 -146.0 246.7 -8.4 310 2542 0.00 2.50 0.00 0.000 4 0.000 0.051 2266 1372 3523 0 0 0 0 0 0
2646 -0.74 -146.0 255.5 -7.9 319 2650 0.00 2.58 0.00 0.000 6 0.000 0.064 2265 2913 3523 0 0 0 0 0 0
2971 -0.77 -146.0 282.8 -8.7 349 2976 0.12 2.47 0.00 0.000 4 0.109 0.050 2211 1372 3523 0 0 0 0 0 0
3011 -0.71 -146.0 287.4 -11.8 352 3017 0.12 2.55 0.00 0.000 6 0.190 0.063 2238 2901 3523 0 0 0 0 0 0
3337 -0.69 -146.0 320.3 -10.2 382 3341 0.00 2.45 0.00 0.000 4 0.000 0.050 2237 1371 3523 0 0 0 0 0 0
3357 -0.69 -146.0 322.7 -10.3 383 3365 0.00 2.53 0.00 0.000 6 0.000 0.062 2237 2892 3523 0 0 0 0 0 0
3684 -0.66 -146.0 355.5 -9.6 414 3688 0.00 2.42 0.00 0.000 4 0.000 0.049 2238 1365 3523 0 0 0 0 0 0
3727 -0.66 -146.0 359.8 -9.3 417 3734 0.00 2.53 0.00 0.000 6 0.000 0.061 2237 2888 3523 0 0 0 0 0 0
4053 -0.64 -146.0 387.7 -8.3 448 4058 0.12 2.45 0.00 0.000 4 0.185 0.050 2271 1362 3524 0 0 0 0 0 0
4105 -0.71 -146.0 391.4 -6.4 452 4110 0.00 2.53 0.00 0.000 6 0.000 0.061 2271 2880 3524 0 0 0 0 0 0
4431 -0.77 -146.0 412.3 -6.9 482 4436 0.12 2.42 0.00 0.000 4 0.106 0.049 2218 1365 3524 0 0 0 0 0 0
4452 -0.77 -146.0 414.5 -9.4 483 4459 0.00 2.47 0.00 0.000 6 0.000 0.061 2217 2868 3524 0 0 0 0 0 0
4779 -0.71 -146.0 451.0 -11.4 514 4783 0.00 2.38 0.00 0.000 4 0.000 0.049 2217 1370 3524 0 0 0 0 0 0
4819 -0.67 -146.0 455.6 -11.4 517 4824 0.15 2.47 0.00 0.000 6 0.177 0.062 2256 2859 3524 0 0 0 0 0 0
5145 -0.70 -146.0 484.3 -9.0 547 5149 0.00 2.38 0.00 0.000 4 0.000 0.049 2256 1371 3525 0 0 0 0 0 0
5185 -0.75 -146.0 487.9 -8.6 550 5190 0.00 2.45 0.00 0.000 6 0.000 0.062 2257 2845 3525 0 0 0 0 0 0
5505 -0.78 -146.0 516.8 -9.0 568 5509 0.00 2.35 0.00 0.000 4 0.000 0.049 2256 1365 3525 0 0 0 0 0 0
5539 -0.81 -146.0 520.1 -9.4 569 5544 0.12 2.40 0.00 0.000 6 0.103 0.061 2197 2831 3525 0 0 0 0 0 0
5875 -0.72 -146.0 560.8 -12.2 580 5877 0.17 0.00 0.00 0.000 6 0.179 0.000 2244 2831 3525 0 0 0 0 0 0
6181 -0.72 -146.0 588.2 -9.0 590 6185 0.00 2.33 0.00 0.000 4 0.000 0.049 2244 1362 3526 0 0 0 0 0 0
6214 -0.74 -146.0 591.3 -9.5 591 6218 0.00 2.42 0.00 0.000 6 0.000 0.061 2244 2820 3526 0 0 0 0 0 0
6543 -0.74 -146.0 621.3 -9.3 602 6544 0.00 0.00 0.00 0.000 6 0.000 0.000 2243 2820 3526 0 0 0 0 0 0
6849 -0.74 -146.0 648.8 -8.9 612 6853 0.00 2.30 0.00 0.000 4 0.000 0.050 2243 1367 3526 0 0 0 0 0 0
6879 -0.74 -146.0 651.4 -8.7 613 6883 0.00 2.38 0.00 0.000 6 0.000 0.061 2243 2810 3526 0 0 0 0 0 0
7214 -0.74 -146.0 679.4 -8.3 624 7215 0.00 0.00 0.00 0.000 6 0.000 0.000 2243 2810 3526 0 0 0 0 0 0
7520 -0.74 -146.0 705.8 -8.7 634 7524 0.00 2.30 0.00 0.000 4 0.000 0.049 2243 1370 3526 0 0 0 0 0 0
7553 -0.74 -146.0 708.8 -9.4 635 7557 0.00 2.38 0.00 0.000 6 0.000 0.062 2243 2810 3526 0 0 0 0 0 0
7882 -0.74 -146.0 736.3 -8.4 646 7886 0.00 1.90 0.00 0.000 4 0.000 0.072 2238 3921 3526 0 0 0 0 0 0
7926 -0.74 -146.0 740.4 -8.9 647 7930 0.00 1.83 0.00 0.000 6 0.000 0.047 2238 2800 3527 0 0 0 0 0 0
8256 -0.74 -146.0 768.7 -8.6 658 8257 0.00 0.00 0.00 0.000 6 0.000 0.000 2238 2800 3526 0 0 0 0 0 0
8562 -0.74 -146.0 794.0 -8.4 668 8566 0.00 2.25 0.00 0.000 4 0.000 0.048 2237 1368 3527 0 0 0 0 0 0
8618 -0.77 -146.0 798.8 -8.4 669 8624 0.00 2.35 0.00 0.000 6 0.000 0.062 2238 2792 3526 0 0 0 0 0 0
8931 -0.77 -146.0 825.4 -8.6 680 8934 0.00 1.95 0.00 0.000 4 0.000 0.073 2235 3929 3526 0 0 0 0 0 0
8958 -0.77 -146.0 827.9 -8.7 680 8965 0.00 1.85 0.00 0.000 6 0.000 0.047 2235 2793 3526 0 0 0 0 0 0
9275 -0.77 -146.0 856.3 -9.1 691 9279 0.00 2.25 0.00 0.000 4 0.000 0.050 2235 1362 3526 0 0 0 0 0 0
9319 -0.79 -146.0 860.6 -8.7 692 9323 0.00 2.35 0.00 0.000 6 0.000 0.061 2235 2786 3526 0 0 0 0 0 0
9637 -0.79 -146.0 886.9 -8.2 703 9642 0.00 1.92 0.00 0.000 4 0.000 0.073 2235 3935 3526 0 0 0 0 0 0
9672 -0.79 -146.0 890.1 -9.0 704 9676 0.00 1.85 0.00 0.000 6 0.000 0.047 2235 2775 3526 0 0 0 0 0 0
9766 end dive: TARGET_DEPTH_EXCEEDED
state 9766 begin apogee
9771 -0.14 0.0 898.2 8.5 707 9906 0.57 0.00 127.07 1.172 4 0.138 0.000 2421 2596 2922 0 0 0 0 0 0
9907 end apogee: CONTROL_FINISHED_OK
state 9907 begin climb
9909 0.57 146.0 901.5 0.0 711 10055 0.70 2.45 134.20 1.143 4 0.070 0.049 2661 1186 2326 0 0 0 0 0 0
10168 0.53 146.0 879.3 11.5 719 10172 0.00 2.47 0.00 0.000 6 0.000 0.056 2661 2600 2319 0 0 0 0 0 0
10492 0.46 146.0 838.4 12.5 730 10497 0.12 2.35 0.00 0.000 4 0.201 0.054 2636 1188 2314 0 0 0 0 0 0
10698 0.47 162.6 817.7 9.2 736 10721 0.00 2.35 13.77 1.036 6 0.000 0.057 2637 2618 2259 0 0 0 0 0 0
11027 0.47 162.6 781.7 11.2 747 11028 0.00 0.00 0.00 0.000 6 0.000 0.000 2637 2619 2256 0 0 0 0 0 0
11332 0.47 162.6 747.5 11.2 757 11336 0.00 2.20 0.00 0.000 4 0.000 0.068 2636 3936 2255 0 0 0 0 0 0
11360 0.42 162.6 743.9 13.2 757 11368 0.12 2.17 0.00 0.000 6 0.205 0.045 2614 2589 2254 0 0 0 0 0 0
11673 0.45 172.4 713.8 9.5 768 11688 0.00 2.28 9.68 0.964 4 0.000 0.069 2614 3935 2219 0 0 0 0 0 0
11706 0.45 172.4 710.3 10.7 769 11710 0.00 2.15 0.00 0.000 6 0.000 0.044 2614 2604 2217 0 0 0 0 0 0
12043 0.50 186.6 678.9 9.3 780 12062 0.00 2.33 13.85 0.987 4 0.000 0.054 2614 1186 2162 0 0 0 0 0 0
12090 0.61 232.7 674.3 7.9 781 12139 0.15 2.35 41.25 1.011 6 0.095 0.056 2678 2612 1973 0 0 0 0 0 0
12446 0.56 232.7 624.4 14.6 793 12447 0.00 0.00 0.00 0.000 6 0.000 0.000 2678 2612 1966 0 0 0 0 0 0
12750 0.51 232.7 579.0 14.6 803 12752 0.15 0.00 0.00 0.000 6 0.187 0.000 2639 2612 1964 0 0 0 0 0 0
13057 0.54 232.7 544.9 10.9 813 13058 0.00 0.00 0.00 0.000 6 0.000 0.000 2639 2612 1963 0 0 0 0 0 0
13363 0.57 232.7 510.8 11.0 823 13367 0.00 2.28 0.00 0.000 4 0.000 0.054 2639 1187 1963 0 0 0 0 0 0
13384 0.63 232.7 508.3 11.1 823 13392 0.10 2.30 0.00 0.000 6 0.116 0.056 2680 2608 1963 0 0 0 0 0 0
13707 0.58 232.7 462.5 14.4 850 13708 0.00 0.00 0.00 0.000 6 0.000 0.000 2680 2608 1962 0 0 0 0 0 0
14027 0.54 232.7 416.7 14.0 880 14032 0.12 2.28 0.00 0.000 4 0.197 0.054 2650 1181 1962 0 0 0 0 0 0
14048 0.54 232.7 413.6 13.1 881 14055 0.00 2.33 0.00 0.000 6 0.000 0.056 2650 2611 1962 0 0 0 0 0 0
14373 0.54 232.7 376.3 11.8 912 14374 0.00 0.00 0.00 0.000 6 0.000 0.000 2650 2611 1961 0 0 0 0 0 0
14694 0.54 232.7 336.9 12.2 942 14698 0.00 2.20 0.00 0.000 4 0.000 0.068 2650 3926 1961 0 0 0 0 0 0
14722 0.54 232.7 333.0 14.1 944 14726 0.00 2.12 0.00 0.000 6 0.000 0.046 2651 2600 1960 0 0 0 0 0 0
15053 0.54 232.7 292.9 11.1 975 15057 0.00 2.22 0.00 0.000 4 0.000 0.054 2651 1186 1960 0 0 0 0 0 0
15093 0.60 232.7 288.7 10.7 978 15097 0.00 2.30 0.00 0.000 6 0.000 0.056 2651 2614 1960 0 0 0 0 0 0
15418 0.63 232.7 253.7 10.6 1008 15419 0.00 0.00 0.00 0.000 6 0.000 0.000 2651 2614 1960 0 0 0 0 0 0
15738 0.66 232.7 220.0 11.0 1038 15743 0.10 2.17 0.00 0.000 4 0.122 0.068 2692 3926 1960 0 0 0 0 0 0
15782 0.58 232.7 213.4 15.5 1041 15790 0.12 2.12 0.00 0.000 6 0.203 0.045 2663 2601 1959 0 0 0 0 0 0
16107 0.58 232.7 174.8 11.3 1072 16108 0.00 0.00 0.00 0.000 6 0.000 0.000 2663 2601 1959 0 0 0 0 0 0
16429 0.61 232.7 140.4 10.3 1102 16433 0.00 2.22 0.00 0.000 4 0.000 0.052 2663 1184 1959 0 0 0 0 0 0
16451 0.66 232.7 137.8 10.3 1103 16458 0.00 2.33 0.00 0.000 6 0.000 0.056 2663 2629 1959 0 0 0 0 0 0
16776 0.71 232.7 104.2 10.2 1134 16781 0.12 2.33 0.00 0.000 4 0.109 0.053 2714 1182 1959 0 0 0 0 0 0
16838 0.71 232.7 97.3 11.0 1141 16844 0.00 2.30 0.00 0.000 6 0.000 0.056 2714 2606 1960 0 0 0 0 0 0
17184 0.68 232.7 58.0 10.0 1202 17191 0.00 2.25 0.00 0.000 4 0.000 0.054 2715 1189 1960 0 0 0 0 0 0
17233 0.72 247.5 53.5 9.3 1210 17252 0.00 2.30 11.80 0.662 6 0.000 0.057 2715 2598 1914 0 0 0 0 0 0
17591 0.73 272.0 22.3 8.9 1273 17617 0.00 0.00 21.90 0.656 6 0.000 0.000 2716 2598 1813 0 0 0 0 0 0
17800 end climb: SURFACE_DEPTH_REACHED
state 17800 begin surface coast
17829 end surface coast: CONTROL_FINISHED_OK
state 17830 begin surface