Parameter values: Sort by alphabetical glider order
ID | 45 | HD_B | 0.0099999998 | ROLL_MAX | 3860 | ALTIM_BOTTOM_PING_RANGE | 0 |
MISSION | 1 | HD_C | 1.6100001e-05 | ROLL_DEG | 65 | ALTIM_TOP_PING_RANGE | 0 |
DIVE | 4 | HEADING | -1 | C_ROLL_DIVE | 3500 | ALTIM_BOTTOM_TURN_MARGIN | 0 |
N_DIVES | 0 | ESCAPE_HEADING | 0 | C_ROLL_CLIMB | 3500 | ALTIM_TOP_TURN_MARGIN | 0 |
STOP_T | 0 | ESCAPE_HEADING_DELTA | 10 | HEAD_ERRBAND | 180 | ALTIM_TOP_MIN_OBSTACLE | 1 |
D_SURF | 2 | FIX_MISSING_TIMEOUT | 0 | ROLL_CNV | 0.04555 | ALTIM_PING_DEPTH | 115 |
D_FLARE | 3 | TGT_DEFAULT_LAT | 4736 | ROLL_TIMEOUT | 15 | ALTIM_PING_DELTA | 5 |
D_TGT | 180 | TGT_DEFAULT_LON | -12218 | R_PORT_OVSHOOT | 37 | ALTIM_FREQUENCY | 13 |
D_ABORT | 6010 | TGT_AUTO_DEFAULT | 0 | R_STBD_OVSHOOT | 12 | ALTIM_PULSE | 3 |
D_NO_BLEED | 50 | SM_CC | 330 | ROLL_AD_RATE | 300 | ALTIM_SENSITIVITY | 2 |
D_BOOST | 0 | N_FILEKB | 4 | ROLL_MAXERRORS | 2 | XPDR_VALID | 2 |
T_BOOST | 0 | FILEMGR | 0 | ROLL_ADJ_GAIN | 0 | XPDR_INHIBIT | 90 |
D_FINISH | 0 | CALL_NDIVES | 1 | ROLL_ADJ_DBAND | 0 | INT_PRESSURE_SLOPE | 0.0097660003 |
D_PITCH | 0 | COMM_SEQ | 0 | VBD_MIN | 340 | INT_PRESSURE_YINT | 0 |
D_SAFE | 0 | PROTOCOL | 9 | VBD_MAX | 3960 | DEEPGLIDER | 1 |
D_CALL | 0 | N_NOCOMM | 1 | C_VBD | 1858 | MOTHERBOARD | 4 |
SURFACE_URGENCY | 0 | NOCOMM_ACTION | 0 | VBD_DBAND | 2 | DEVICE1 | 2 |
SURFACE_URGENCY_TRY | 0 | N_NOSURFACE | 0 | VBD_CNV | -0.29049999 | DEVICE2 | 101 |
SURFACE_URGENCY_FORCE | 0 | UPLOAD_DIVES_MAX | -1 | VBD_LP_IGNORE | 0 | DEVICE3 | -1 |
T_DIVE | 60 | CALL_TRIES | 10 | VBD_TIMEOUT | 720 | DEVICE4 | -1 |
T_MISSION | 70 | CALL_WAIT | 60 | PITCH_VBD_SHIFT | 0.0012300001 | DEVICE5 | -1 |
T_ABORT | 1440 | CAPUPLOAD | 1 | VBD_PUMP_AD_RATE_SURFACE | 4 | DEVICE6 | -1 |
T_TURN | 360 | CAPMAXSIZE | 200000 | VBD_PUMP_AD_RATE_APOGEE | 3 | LOGGERS | 0 |
T_TURN_SAMPINT | 5 | HEAPDBG | 0 | VBD_BLEED_AD_RATE | 8 | LOGGERDEVICE1 | -1 |
T_NO_W | 120 | T_GPS | 5 | UNCOM_BLEED | 60 | LOGGERDEVICE2 | -1 |
T_LOITER | 0 | N_GPS | 100840 | VBD_MAXERRORS | 1 | LOGGERDEVICE3 | -1 |
T_SLOITER | 0 | T_RSLEEP | 3 | W_ADJ_DBAND | 0 | LOGGERDEVICE4 | -1 |
T_EPIRB | 0 | STROBE | 0 | DBDW | 0 | COMPASS_DEVICE | 161 |
USE_BATHY | -6 | RAFOS_PEAK_OFFSET | 1.5 | PITCH_W_GAIN | 0 | COMPASS2_DEVICE | -1 |
USE_ICE | -1 | RAFOS_CORR_THRESH | 60 | PITCH_W_DBAND | 0 | PHONE_DEVICE | 49 |
ICE_FREEZE_MARGIN | 0.30000001 | RAFOS_HIT_WINDOW | 3600 | CF8_MAXERRORS | 2 | GPS_DEVICE | 48 |
D_OFFGRID | 100 | RAFOS_MMODEM | 0 | AH0_24V | 150 | RAFOS_DEVICE | -1 |
T_WATCHDOG | 10 | PITCH_MIN | 200 | AH0_10V | 100 | XPDR_DEVICE | 24 |
RELAUNCH | 1 | PITCH_MAX | 3820 | MINV_24V | 19 | SIM_W | 0 |
APOGEE_PITCH | -5 | C_PITCH | 3097 | MINV_10V | 8 | SIM_PITCH | 0 |
MAX_BUOY | 80 | PITCH_DBAND | 0.1 | MAXI_24V | 0.60000002 | SEABIRD_T_G | 0.0044369884 |
COURSE_BIAS | 0 | PITCH_CNV | 0.003125763 | MAXI_10V | 0.80000001 | SEABIRD_T_H | 0.00066042581 |
GLIDE_SLOPE | 50 | P_OVSHOOT | 0.039999999 | FG_AHR_10V | 0 | SEABIRD_T_I | 2.7363718e-05 |
SPEED_FACTOR | 1 | P_OVSHOOT_WITHG | 0.079999998 | FG_AHR_24V | 0 | SEABIRD_T_J | 3.4006232e-06 |
RHO | 1.023 | PITCH_GAIN | 12.7 | PHONE_SUPPLY | 2 | SEABIRD_C_G | -10.01541 |
MASS | 79797 | PITCH_TIMEOUT | 18 | PRESSURE_YINT | -12.047719 | SEABIRD_C_H | 1.1730425 |
MASS_COMP | 10859 | PITCH_AD_RATE | 145 | PRESSURE_SLOPE | 0 | SEABIRD_C_I | -0.0023542538 |
NAV_MODE | 0 | PITCH_MAXERRORS | 1 | AD7714Ch0Gain | 32 | SEABIRD_C_J | 0.00025774896 |
FERRY_MAX | 45 | PITCH_ADJ_GAIN | 0 | TCM_PITCH_OFFSET | 0 | SEABIRD_C_Z | 2927.8301 |
KALMAN_USE | 1 | PITCH_ADJ_DBAND | 0 | TCM_ROLL_OFFSET | 0 | ||
HD_A | 0.003 | ROLL_MIN | 250 | COMPASS_USE | 4 |
Pre-dive calculations and measurements:
GPS1 |   020818,202231,4744.2817,-12224.1992,8,1.0,31,16.3,0.4,53.0,8,6.0 | TGT_NAME |   SOUTH |
_CALLS |   1 | TGT_LATLONG |   4743.000,-12224.500 |
_XMS_NAKs |   0 | TGT_RADIUS |   750.000 |
_XMS_TOUTs |   0 | KALMAN_CONTROL |   -0.089022,-0.170348 |
_SM_DEPTHo |   1.89 | KALMAN_X |   476.324066,451.539124,255.312912,-1268.003174,218.820511 |
_SM_ANGLEo |   -54.6 | KALMAN_Y |   182.081238,207.097260,203.744659,1153.289429,90.985260 |
GPS2 |   020818,202837,4744.3394,-12224.1270,10,1.0,19,16.3,0.0,38.8,8,9.5 | MHEAD_RNG_PITCHd_Wd |   174.3,2524,-24.5,-10.000,-27.49,1187 |
SPEED_LIMITS |   0.084,0.192 | D_GRID |   175 |
Post-dive calculations and measurements:
FINISH |   1.3,1.009789 | _24V_AH |   24.90,0.678 |
SM_CCo |   3285,156.68,0.618,0,0,721,330.01 | _10V_AH |   10.59,0.437 |
SM_GC |   1.98,9.07,0.00,156.68,0.089,0.000,0.618,215,3493,721,-8.97,-0.36,330.01,0,0,0,0,0,0,26.40,26.83,24.90 | FG_AHR_24Vo |   0.000 |
IRIDIUM_FIX |   4744.92,-12331.63,020818,192009 | FG_AHR_10Vo |   0.000 |
TT8_MAMPS |   0.021721,0.167027 | MEM |   312640 |
HUMID |   17.55 | DATA_FILE_SIZE |   24531,363 |
INTERNAL_PRESSURE |   8.95542 | CAP_FILE_SIZE |   54064,0 |
TCM_TEMP |   14.60 | CFSIZE |   2046525440,2044002304 |
XPDR_PINGS |   1 | ERRORS |   0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0 |
ALTIM_BOTTOM_PING |   115.0,70.6 | GPS |   020818,212819,4744.595,-12224.083,8,1.0,40,16.3,0.3,23.4,8,5.1 |
Energy measurements:
device | secs | mA | J | sensor | secs | mA | J |
Pitch_motor | 22 | 285 | 157.13 | SBE_CT | 245 | 23 | 142.22 |
Roll_motor | 3 | 84 | 6.73 | AA4330 | 473 | 30 | 362.17 |
VBD_pump_during_apogee | 136 | 720 | 2441.58 | nil | 0 | 0 | 0.00 |
VBD_pump_during_surface | 156 | 618 | 2411.99 | nil | 0 | 0 | 0.00 |
VBD_valve | 111 | 146 | 405.63 | nil | 0 | 0 | 0.00 |
Iridium_during_init | 26 | 34 | 22.51 | nil | 0 | 0 | 0.00 |
Iridium_during_connect | 34 | 160 | 135.91 | nil | 0 | 0 | 0.00 |
Iridium_during_xfer | 223 | 223 | 1242.11 | nil | 0 | 0 | 0.00 |
Transponder_ping | 0 | 420 | 7.84 | nil | 0 | 0 | 0.00 |
GUMSTIX_24V | 0 | 0 | 0.00 | ||||
GPS | 20 | 13 | 2.96 | ||||
TT8 | 965 | 12 | 124.88 | ||||
LPSleep | 1568 | 2 | 36.38 | ||||
TT8_Active | 414 | 11 | 50.33 | ||||
TT8_Sampling | 846 | 36 | 324.24 | ||||
TT8_CF8 | 37 | 51 | 20.60 | ||||
TT8_Kalman | 32 | 56 | 19.38 | ||||
Analog_circuits | 732 | 11 | 85.38 | ||||
GPS_charging | 0 | 0 | 0.00 | ||||
Compass | 541 | 7 | 42.99 | ||||
RAFOS | 0 | 0 | 0.00 | ||||
Transponder | 10 | 30 | 3.18 | ||||
Guidance and control:
st_secs | pitch_ctl | vbd_ctl | pitch_ad_start | roll_ad_start | vbd_pot1_ad_start | vbd_pot2_ad_start | 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 | vbd_pot1_ad | vbd_pot2_ad | pitch_retries | pitch_errors | roll_retries | roll_errors | vbd_retries | vbd_errors | pitch_volts | roll_volts | vbd_volts | int_press | humidity |
5 | end surface: CONTROL_FINISHED_OK | ||||||||||||||||||||||||||||||||
state | 5 | begin dive | |||||||||||||||||||||||||||||||
7 | -2.03 | -78.2 | 178 | 3490 | 727 | 714 | 0.0 | 0.0 | 0 | 124 | 0.00 | 0.00 | -111.20 | 0.146 | 16390 | 0.000 | 0.000 | 178 | 3491 | 2128 | 2126 | 2130 | 0 | 0 | 0 | 0 | 0 | 0 | 26.48 | 26.15 | 26.01 | 9.02 | 18.38 |
126 | -2.03 | -78.2 | 178 | 3491 | 2126 | 2130 | 3.2 | -1.8 | 19 | 139 | 9.18 | 0.00 | 0.00 | 0.000 | 2054 | 0.286 | 0.000 | 2443 | 3492 | 2129 | 2123 | 2135 | 0 | 0 | 0 | 0 | 0 | 0 | 25.84 | 26.12 | 26.07 | 9.15 | 18.30 |
201 | -2.03 | -78.2 | 2442 | 3492 | 2121 | 2138 | 11.9 | -10.2 | 33 | 207 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.49 | 26.51 | 26.51 | 9.16 | 17.71 |
269 | -2.03 | -78.2 | 2442 | 3493 | 2120 | 2139 | 18.7 | -10.5 | 46 | 275 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.58 | 26.59 | 26.58 | 9.16 | 17.59 |
342 | -2.03 | -78.2 | 2442 | 3492 | 2120 | 2139 | 28.2 | -13.1 | 54 | 343 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2444 | 3492 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.64 | 26.66 | 26.65 | 9.16 | 17.23 |
463 | -2.03 | -78.2 | 2442 | 3493 | 2120 | 2139 | 44.2 | -12.9 | 66 | 464 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.72 | 26.74 | 26.74 | 9.16 | 17.67 |
582 | -2.03 | -78.2 | 2442 | 3493 | 2120 | 2139 | 57.3 | -10.9 | 78 | 583 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.79 | 26.80 | 26.79 | 9.16 | 17.71 |
702 | -2.03 | -78.2 | 2442 | 3493 | 2120 | 2139 | 70.1 | -11.4 | 90 | 703 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.84 | 26.86 | 26.85 | 9.15 | 17.63 |
822 | -2.03 | -78.2 | 2442 | 3493 | 2120 | 2138 | 83.8 | -10.1 | 102 | 823 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.88 | 26.89 | 26.89 | 9.15 | 17.39 |
943 | -2.03 | -78.2 | 2442 | 3493 | 2120 | 2139 | 94.1 | -8.0 | 114 | 944 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3492 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.91 | 26.93 | 26.93 | 9.16 | 17.27 |
1062 | -2.03 | -78.2 | 2442 | 3493 | 2120 | 2139 | 104.7 | -9.1 | 126 | 1064 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.94 | 26.96 | 26.96 | 9.15 | 17.59 |
1182 | -2.03 | -78.2 | 2442 | 3493 | 2119 | 2139 | 117.5 | -11.0 | 138 | 1183 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.96 | 26.98 | 26.98 | 9.15 | 18.34 |
1302 | -2.03 | -78.2 | 2442 | 3493 | 2119 | 2139 | 129.7 | -10.5 | 150 | 1303 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2442 | 3493 | 2129 | 2120 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 26.98 | 27.00 | 27.00 | 9.15 | 17.90 |
1422 | -2.03 | -78.2 | 2442 | 3493 | 2119 | 2139 | 142.8 | -12.0 | 162 | 1423 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2119 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 27.01 | 27.02 | 27.01 | 9.14 | 18.10 |
1542 | -2.03 | -78.2 | 2442 | 3493 | 2119 | 2139 | 155.9 | -10.0 | 174 | 1543 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2119 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 27.02 | 27.03 | 27.03 | 9.14 | 17.51 |
1662 | -2.03 | -78.2 | 2442 | 3493 | 2119 | 2139 | 168.8 | -10.4 | 186 | 1663 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2443 | 3493 | 2129 | 2119 | 2139 | 0 | 0 | 0 | 0 | 0 | 0 | 27.03 | 27.05 | 27.05 | 9.14 | 18.30 |
1731 | end dive: TARGET_DEPTH_EXCEEDED | ||||||||||||||||||||||||||||||||
state | 1731 | begin apogee | |||||||||||||||||||||||||||||||
1734 | -0.39 | 0.0 | 2443 | 3493 | 2119 | 2139 | 175.7 | -9.9 | 193 | 1794 | 1.67 | 0.00 | 55.70 | 0.720 | 10246 | 0.211 | 0.000 | 2961 | 3492 | 1857 | 1835 | 1880 | 0 | 0 | 0 | 0 | 0 | 0 | 26.53 | 25.94 | 25.42 | 9.14 | 17.63 |
1795 | end apogee: CONTROL_FINISHED_OK | ||||||||||||||||||||||||||||||||
state | 1796 | begin climb | |||||||||||||||||||||||||||||||
1797 | 2.03 | 78.2 | 2961 | 3491 | 1834 | 1880 | 177.5 | 0.0 | 199 | 1863 | 2.17 | 0.00 | 57.08 | 0.713 | 10246 | 0.139 | 0.000 | 3727 | 3493 | 1587 | 1569 | 1605 | 0 | 0 | 0 | 0 | 0 | 0 | 25.94 | 25.32 | 24.97 | 9.12 | 17.75 |
1982 | 2.03 | 78.2 | 3726 | 3493 | 1569 | 1607 | 156.1 | 14.4 | 218 | 1984 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3726 | 3493 | 1587 | 1569 | 1606 | 0 | 0 | 0 | 0 | 0 | 0 | 26.31 | 26.32 | 26.32 | 9.09 | 17.39 |
2102 | 2.03 | 78.2 | 3726 | 3492 | 1569 | 1607 | 138.9 | 13.5 | 230 | 2103 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3725 | 3492 | 1588 | 1570 | 1607 | 0 | 0 | 0 | 0 | 0 | 0 | 26.51 | 26.52 | 26.52 | 9.08 | 17.35 |
2222 | 2.03 | 78.2 | 3726 | 3492 | 1570 | 1607 | 123.3 | 12.4 | 242 | 2223 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3726 | 3493 | 1588 | 1569 | 1607 | 0 | 0 | 0 | 0 | 0 | 0 | 26.63 | 26.65 | 26.65 | 9.08 | 17.78 |
2342 | 2.03 | 78.2 | 3726 | 3493 | 1569 | 1607 | 107.7 | 13.2 | 254 | 2343 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3727 | 3492 | 1588 | 1570 | 1607 | 0 | 0 | 0 | 0 | 0 | 0 | 26.71 | 26.73 | 26.73 | 9.08 | 17.47 |
2462 | 2.03 | 78.2 | 3726 | 3493 | 1569 | 1607 | 92.2 | 13.8 | 266 | 2463 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3727 | 3492 | 1588 | 1570 | 1607 | 0 | 0 | 0 | 0 | 0 | 0 | 26.78 | 26.79 | 26.79 | 9.09 | 17.94 |
2582 | 2.03 | 78.2 | 3726 | 3492 | 1569 | 1607 | 76.8 | 12.0 | 278 | 2583 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3727 | 3493 | 1588 | 1570 | 1607 | 0 | 0 | 0 | 0 | 0 | 0 | 26.83 | 26.84 | 26.84 | 9.08 | 18.30 |
2702 | 2.03 | 78.2 | 3726 | 3492 | 1569 | 1607 | 62.4 | 11.6 | 290 | 2703 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3727 | 3493 | 1588 | 1569 | 1607 | 0 | 0 | 0 | 0 | 0 | 0 | 26.87 | 26.89 | 26.89 | 9.08 | 18.14 |
2822 | 2.03 | 78.2 | 3726 | 3493 | 1569 | 1607 | 46.1 | 14.2 | 302 | 2823 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3727 | 3493 | 1588 | 1569 | 1607 | 0 | 0 | 0 | 0 | 0 | 0 | 26.91 | 26.92 | 26.92 | 9.08 | 17.86 |
2942 | 2.03 | 82.2 | 3726 | 3493 | 1569 | 1607 | 32.5 | 9.7 | 314 | 2952 | 0.00 | 0.00 | 4.60 | 0.467 | 8198 | 0.000 | 0.000 | 3726 | 3493 | 1572 | 1553 | 1592 | 0 | 0 | 0 | 0 | 0 | 0 | 26.93 | 26.37 | 26.01 | 9.08 | 18.02 |
3072 | 2.06 | 107.7 | 3726 | 3492 | 1554 | 1594 | 21.7 | 7.8 | 327 | 3093 | 0.00 | 0.00 | 18.80 | 0.606 | 8198 | 0.000 | 0.000 | 3727 | 3493 | 1486 | 1469 | 1504 | 0 | 0 | 0 | 0 | 0 | 0 | 26.93 | 26.32 | 25.86 | 9.08 | 18.49 |
3212 | 2.06 | 107.7 | 3726 | 3493 | 1469 | 1505 | 7.4 | 13.2 | 352 | 3219 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3727 | 3493 | 1487 | 1469 | 1506 | 0 | 0 | 0 | 0 | 0 | 0 | 26.78 | 26.79 | 26.79 | 9.08 | 18.45 |
3254 | end climb: SURFACE_DEPTH_REACHED | ||||||||||||||||||||||||||||||||
state | 3254 | begin surface coast | |||||||||||||||||||||||||||||||
3270 | end surface coast: CONTROL_FINISHED_OK | ||||||||||||||||||||||||||||||||
state | 3270 | begin surface |