Parameter values: Sort by alphabetical glider order
ID | 221 | HD_A | 0.00184 | ROLL_DEG | 40 | ALTIM_TOP_PING_RANGE | 0 |
MISSION | 7 | HD_B | 0.0133 | C_ROLL_DIVE | 2800 | ALTIM_BOTTOM_TURN_MARGIN | 10 |
DIVE | 167 | HD_C | 1.6100001e-05 | C_ROLL_CLIMB | 2550 | ALTIM_TOP_TURN_MARGIN | 0 |
N_DIVES | 0 | HEADING | -1 | HEAD_ERRBAND | 10 | ALTIM_TOP_MIN_OBSTACLE | 1 |
STOP_T | 0 | ESCAPE_HEADING | 0 | ROLL_CNV | 0.028270001 | ALTIM_PING_DEPTH | 0 |
D_SURF | 2 | ESCAPE_HEADING_DELTA | 10 | ROLL_TIMEOUT | 15 | ALTIM_PING_DELTA | 20 |
D_FLARE | 3 | FIX_MISSING_TIMEOUT | 1 | R_PORT_OVSHOOT | 43 | ALTIM_FREQUENCY | 13 |
D_TGT | 270 | TGT_DEFAULT_LAT | 4736 | R_STBD_OVSHOOT | 20 | ALTIM_PULSE | 1 |
D_ABORT | 1020 | TGT_DEFAULT_LON | -12218 | ROLL_AD_RATE | 300 | ALTIM_SENSITIVITY | 4 |
D_NO_BLEED | 400 | TGT_AUTO_DEFAULT | 0 | ROLL_MAXERRORS | 2 | XPDR_VALID | 3 |
D_BOOST | 110 | SM_CC | 300 | ROLL_ADJ_GAIN | 0 | XPDR_INHIBIT | 90 |
T_BOOST | 0 | N_FILEKB | 8 | ROLL_ADJ_DBAND | 0 | INT_PRESSURE_SLOPE | 0.0097660003 |
D_FINISH | 10 | FILEMGR | 0 | VBD_MIN | 1900 | INT_PRESSURE_YINT | 0.80000001 |
D_PITCH | 3 | CALL_NDIVES | 1 | VBD_MAX | 3960 | DEEPGLIDER | 0 |
D_SAFE | 150 | COMM_SEQ | 0 | C_VBD | 3400 | MOTHERBOARD | 4 |
D_CALL | 2 | PROTOCOL | 9 | VBD_DBAND | 2 | DEVICE1 | -1 |
SURFACE_URGENCY | 5 | N_NOCOMM | 3 | VBD_CNV | -0.25119999 | DEVICE2 | -1 |
SURFACE_URGENCY_TRY | 5 | NOCOMM_ACTION | 163 | VBD_LP_IGNORE | 0 | DEVICE3 | -1 |
SURFACE_URGENCY_FORCE | 10 | N_NOSURFACE | 0 | VBD_TIMEOUT | 720 | DEVICE4 | -1 |
T_DIVE | 98 | UPLOAD_DIVES_MAX | -1 | PITCH_VBD_SHIFT | 0.0012300001 | DEVICE5 | -1 |
T_MISSION | 120 | CALL_TRIES | 5 | VBD_PUMP_AD_RATE_SURFACE | 1 | DEVICE6 | -1 |
T_ABORT | 1440 | CALL_WAIT | 60 | VBD_PUMP_AD_RATE_APOGEE | 1 | LOGGERS | 1 |
T_TURN | 225 | CAPUPLOAD | 0 | VBD_BLEED_AD_RATE | 8 | LOGGERDEVICE1 | 53 |
T_TURN_SAMPINT | -5 | CAPMAXSIZE | 100000 | UNCOM_BLEED | 200 | LOGGERDEVICE2 | -1 |
T_NO_W | 120 | HEAPDBG | 0 | VBD_MAXERRORS | 5 | LOGGERDEVICE3 | -1 |
T_LOITER | 0 | T_GPS | 5 | W_ADJ_DBAND | 2 | LOGGERDEVICE4 | -1 |
T_EPIRB | 0 | N_GPS | 100440 | DBDW | 0 | COMPASS_DEVICE | 97 |
EXEC_P | 0 | T_RSLEEP | 2 | LOITER_W_DBAND | 1 | COMPASS2_DEVICE | 149 |
EXEC_DT | 0 | STROBE | 0 | LOITER_DBDW | 300 | PHONE_DEVICE | 49 |
EXEC_T | 0 | RAFOS_PEAK_OFFSET | -1 | LOITER_D_NO_PUMP | 300 | GPS_DEVICE | 64 |
EXEC_N | 0 | RAFOS_CORR_THRESH | 60 | LOITER_N_DIVE | 1 | RAFOS_DEVICE | 32 |
USE_BATHY | -3 | RAFOS_HIT_WINDOW | 3600 | PITCH_W_GAIN | 2 | XPDR_DEVICE | 24 |
USE_ICE | 1 | RAFOS_MMODEM | 0 | PITCH_W_DBAND | 0.5 | SIM_W | 0 |
ICE_FREEZE_MARGIN | 0.079999998 | PITCH_MIN | 200 | CF8_MAXERRORS | 2 | SEABIRD_T_G | 0.0044198656 |
D_OFFGRID | 600 | PITCH_MAX | 3910 | AH0_24V | 350 | SEABIRD_T_H | 0.00064431952 |
T_WATCHDOG | 10 | C_PITCH | 2730 | AH0_10V | 0 | SEABIRD_T_I | 2.6320724e-05 |
RELAUNCH | 1 | PITCH_DBAND | 0.1 | MINV_24V | 10 | SEABIRD_T_J | 3.2746798e-06 |
APOGEE_PITCH | -5 | PITCH_CNV | 0.0031300001 | MINV_10V | 10 | SEABIRD_C_G | -9.9022408 |
MAX_BUOY | 125 | P_OVSHOOT | 0.039999999 | MAXI_24V | 0.60000002 | SEABIRD_C_H | 1.1403944 |
COURSE_BIAS | 0 | P_OVSHOOT_WITHG | 0 | MAXI_10V | 1.1 | SEABIRD_C_I | -0.0013212307 |
GLIDE_SLOPE | 45 | PITCH_GAIN | 22 | FG_AHR_10V | 0 | SEABIRD_C_J | 0.00017705678 |
SPEED_FACTOR | 1 | PITCH_TIMEOUT | 24 | FG_AHR_24V | 0 | SC_RECORDABOVE | 2000.0 |
RHO | 1.0275 | PITCH_AD_RATE | 175 | PHONE_SUPPLY | -2 | SC_PROFILE | 3.0 |
MASS | 53510 | PITCH_MAXERRORS | 1 | PRESSURE_YINT | -160.68855 | SC_XMITPROFILE | 3.0 |
MASS_COMP | 0 | PITCH_ADJ_GAIN | 0 | PRESSURE_SLOPE | 0.000108275 | SC_NDIVE | 1.0 |
NAV_MODE | 2 | PITCH_ADJ_DBAND | 0 | AD7714Ch0Gain | 1 | ||
FERRY_MAX | 45 | ROLL_MIN | 230 | COMPASS_USE | 4 | ||
KALMAN_USE | 2 | ROLL_MAX | 3910 | ALTIM_PING_FIT | 883 |
Pre-dive calculations and measurements:
GPS1 |   240218,151355,-7402.2036,-11245.4893,30,1.0,30,53.4,0.3,339.3,7,5.9 | SPEED_LIMITS |   0.092,0.191 |
_CALLS |   1 | TGT_NAME |   W0 |
_XMS_NAKs |   0 | TGT_LATLONG |   -7408.220,-11312.000 |
_XMS_TOUTs |   0 | TGT_RADIUS |   2000.000 |
_SM_DEPTHo |   0.71 | MHEAD_RNG_PITCHd_Wd |   145.0,17447,-17.6,-9.184,-25.67,1902 |
_SM_ANGLEo |   -63.7 | D_GRID |   796 |
GPS2 |   240218,151826,-7402.1699,-11245.5830,2,1.0,3,53.4,0.5,162.9,7,9.4 |
Post-dive calculations and measurements:
FREEZE |   0.22,-1.723,-1.861,2,1,0 | _24V_AH |   12.72,63.925 |
FINISH |   0.2,1.027309 | _10V_AH |   12.72,0.000 |
SM_CCo |   5145,163.80,0.224,0,0,2204,300.18 | FG_AHR_24Vo |   0.000 |
SM_GC |   0.70,8.38,0.45,163.80,0.080,0.099,0.224,190,2800,2204,-7.88,-0.74,300.18,0,0,0,0,0,0,14.57,14.57,14.25 | FG_AHR_10Vo |   0.000 |
RAFOS_CLK |   210 | MEM |   280644 |
RAFOS_FIX |   -7402.688965,-11245.375977,240218,161612,0,1,0.19 | DATA_FILE_SIZE |   20112,575 |
IRIDIUM_FIX |   -7403.27,-11246.22,240218,133813 | CAP_FILE_SIZE |   68402,0 |
TT8_MAMPS |   0.038199,0.276381 | CFSIZE |   1024409600,1000816640 |
HUMID |   45.58 | ERRORS |   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
INTERNAL_PRESSURE |   7.76316 | SOUNDSPEED |   1443.0 |
TCM_TEMP |   12.90 | CURRENT |   0.113,310.96,1 |
XPDR_PINGS |   0 | GPS |   240218,164831,-7402.474,-11247.184,35,0.8,35,53.5,0.1,0.0,11,3.1 |
ALTIM_TOP_PING |   23.8,24.5 |
Energy measurements:
device | secs | mA | J | sensor | secs | mA | J |
Pitch_motor | 22 | 468 | 135.48 | nil | 0 | 0 | 0.00 |
Roll_motor | 44 | 98 | 55.95 | nil | 0 | 0 | 0.00 |
VBD_pump_during_apogee | 217 | 2179 | 6016.59 | nil | 0 | 0 | 0.00 |
VBD_pump_during_surface | 163 | 224 | 467.01 | nil | 0 | 0 | 0.00 |
VBD_valve | 0 | 0 | 0.00 | nil | 0 | 0 | 0.00 |
Iridium_during_init | 0 | 0 | 0.00 | nil | 0 | 0 | 0.00 |
Iridium_during_connect | 0 | 0 | 0.00 | SciCon | 5141 | 4 | 271.91 |
Iridium_during_xfer | 173 | 190 | 419.48 | nil | 0 | 0 | 0.00 |
Transponder_ping | 6 | 420 | 36.06 | nil | 0 | 0 | 0.00 |
GUMSTIX_24V | 0 | 0 | 0.00 | ||||
GPS | 5 | 8 | 0.58 | ||||
TT8 | 0 | 0 | 0.00 | ||||
LPSleep | 3632 | 2 | 106.75 | ||||
TT8_Active | 530 | 10 | 73.29 | ||||
TT8_Sampling | 1343 | 30 | 518.64 | ||||
TT8_CF8 | 90 | 51 | 59.38 | ||||
TT8_Kalman | 0 | 0 | 0.00 | ||||
Analog_circuits | 1152 | 10 | 148.10 | ||||
GPS_charging | 0 | 0 | 0.00 | ||||
Compass | 828 | 6 | 71.07 | ||||
RAFOS | 0 | 0 | 0.00 | ||||
Transponder | 47 | 30 | 18.11 | ||||
Altimeter Analysis:
m=0.0,R=0.0,N=0 | m=0.6,R=0.8,N=2 | ||||||||
depth | range | fit R | obstacle | m | R | fit R | obstacle | m | R |
20.4 | 21.50 | 9000.00 | 0.0 | 0.00 | 0.00 | 9000.00 | 0.0 | 0.00 | 0.00 |
41.4 | 44.00 | 9000.00 | 0.0 | 0.00 | 0.00 | 44.00 | 0.0 | 1.07 | 1.00 |
126.8 | 134.80 | 134.80 | -8.0 | 1.07 | 1.00 | 134.80 | -8.0 | 1.06 | 1.00 |
106.3 | 110.60 | 112.10 | -5.8 | 1.06 | 1.00 | 110.60 | -4.3 | 1.18 | 1.00 |
86.2 | 89.50 | 89.00 | -2.8 | 1.12 | 1.00 | 89.50 | -3.3 | 1.05 | 1.00 |
65.7 | 68.10 | 68.10 | -2.4 | 1.04 | 1.00 | 68.10 | -2.4 | 1.04 | 1.00 |
44.7 | 46.30 | 46.30 | -1.6 | 1.04 | 1.00 | 46.30 | -1.6 | 1.04 | 1.00 |
23.8 | 24.50 | 24.50 | -0.7 | 1.04 | 1.00 | 24.50 | -0.7 | 1.04 | 1.00 |
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 |
6 | end surface: CONTROL_FINISHED_OK | ||||||||||||||||||||||||||||||
state | 6 | begin dive | |||||||||||||||||||||||||||||
8 | -0.95 | -121.7 | 187 | 2806 | 2233 | 2143 | 0.0 | 0.0 | 0 | 121 | 0.00 | 0.00 | -107.50 | 0.003 | 16390 | 0.000 | 0.000 | 186 | 2807 | 3888 | 3899 | 3877 | 0 | 0 | 0 | 0 | 0 | 0 | 14.62 | 13.26 | 14.62 |
123 | -0.95 | -121.7 | 186 | 2808 | 3901 | 3878 | 3.1 | -4.0 | 11 | 141 | 12.00 | 2.47 | 0.00 | 0.000 | 2596 | 0.468 | 0.044 | 2411 | 1389 | 3895 | 3902 | 3889 | 0 | 0 | 0 | 0 | 0 | 0 | 14.02 | 14.38 | 14.31 |
290 | -0.95 | -121.7 | 2412 | 1389 | 3903 | 3899 | 25.7 | -10.2 | 44 | 297 | 0.00 | 2.53 | 0.00 | 0.000 | 1030 | 0.000 | 0.072 | 2412 | 2797 | 3900 | 3902 | 3899 | 0 | 0 | 0 | 0 | 0 | 0 | 14.45 | 14.37 | 14.47 |
595 | -0.95 | -121.7 | 2414 | 2798 | 3901 | 3902 | 65.2 | -13.4 | 75 | 601 | 0.00 | 2.42 | 0.00 | 0.000 | 516 | 0.000 | 0.051 | 2412 | 1405 | 3902 | 3903 | 3902 | 0 | 0 | 0 | 0 | 0 | 0 | 14.76 | 14.46 | 14.76 |
620 | -0.95 | -121.7 | 2412 | 1405 | 3903 | 3902 | 68.4 | -12.3 | 80 | 627 | 0.00 | 2.53 | 0.00 | 0.000 | 1030 | 0.000 | 0.074 | 2411 | 2809 | 3902 | 3902 | 3902 | 0 | 0 | 0 | 0 | 0 | 0 | 14.52 | 14.43 | 14.54 |
925 | -0.95 | -121.7 | 2412 | 2810 | 3903 | 3902 | 107.9 | -12.0 | 111 | 926 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2411 | 2809 | 3902 | 3902 | 3902 | 0 | 0 | 0 | 0 | 0 | 0 | 14.83 | 14.80 | 14.81 |
1226 | -0.95 | -121.7 | 2411 | 2810 | 3902 | 3903 | 144.6 | -12.7 | 141 | 1227 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2410 | 2809 | 3902 | 3902 | 3902 | 0 | 0 | 0 | 0 | 0 | 0 | 14.78 | 14.78 | 14.78 |
1525 | -0.95 | -121.7 | 2411 | 2810 | 3902 | 3903 | 182.1 | -11.7 | 171 | 1531 | 0.00 | 2.45 | 0.00 | 0.000 | 516 | 0.000 | 0.052 | 2411 | 1397 | 3902 | 3902 | 3903 | 0 | 0 | 0 | 0 | 0 | 0 | 14.85 | 14.52 | 14.85 |
1556 | -0.95 | -121.7 | 2412 | 1397 | 3903 | 3903 | 185.5 | -11.1 | 177 | 1562 | 0.00 | 2.47 | 0.00 | 0.000 | 1030 | 0.000 | 0.072 | 2411 | 2809 | 3902 | 3902 | 3903 | 0 | 0 | 0 | 0 | 0 | 0 | 14.65 | 14.54 | 14.68 |
1866 | -0.95 | -121.7 | 2411 | 2810 | 3903 | 3904 | 222.1 | -12.5 | 209 | 1873 | 0.00 | 1.98 | 0.00 | 0.000 | 260 | 0.000 | 0.094 | 2403 | 3906 | 3902 | 3902 | 3903 | 0 | 0 | 0 | 0 | 0 | 0 | 14.86 | 14.50 | 14.85 |
1912 | -0.95 | -121.7 | 2404 | 3906 | 3903 | 3903 | 228.4 | -14.0 | 218 | 1919 | 0.00 | 1.88 | 0.00 | 0.000 | 1030 | 0.000 | 0.050 | 2403 | 2799 | 3902 | 3902 | 3903 | 0 | 0 | 0 | 0 | 0 | 0 | 14.64 | 14.60 | 14.66 |
2217 | -0.95 | -121.7 | 2404 | 2800 | 3903 | 3903 | 264.6 | -10.7 | 249 | 2223 | 0.00 | 2.40 | 0.00 | 0.000 | 516 | 0.000 | 0.051 | 2403 | 1399 | 3902 | 3902 | 3903 | 0 | 0 | 0 | 0 | 0 | 0 | 14.86 | 14.54 | 14.87 |
2257 | -0.95 | -121.7 | 2404 | 1400 | 3903 | 3903 | 268.9 | -10.6 | 257 | 2264 | 0.00 | 2.50 | 0.00 | 0.000 | 1030 | 0.000 | 0.071 | 2402 | 2802 | 3902 | 3902 | 3902 | 0 | 0 | 0 | 0 | 0 | 0 | 14.60 | 14.52 | 14.63 |
2267 | end dive: TARGET_DEPTH_EXCEEDED | ||||||||||||||||||||||||||||||
state | 2267 | begin apogee | |||||||||||||||||||||||||||||
2270 | -0.23 | 0.0 | 2403 | 2543 | 3903 | 3903 | 270.1 | -10.3 | 259 | 2383 | 0.93 | 0.00 | 109.53 | 2.179 | 10246 | 0.252 | 0.000 | 2647 | 2543 | 3399 | 3403 | 3396 | 0 | 0 | 0 | 0 | 0 | 0 | 14.31 | 13.85 | 13.05 |
2384 | end apogee: CONTROL_FINISHED_OK | ||||||||||||||||||||||||||||||
state | 2384 | begin climb | |||||||||||||||||||||||||||||
2385 | 0.95 | 121.7 | 2648 | 2543 | 3402 | 3394 | 273.0 | 0.0 | 270 | 2502 | 1.30 | 2.67 | 107.50 | 2.041 | 10756 | 0.161 | 0.065 | 3039 | 1160 | 2911 | 2913 | 2909 | 0 | 0 | 0 | 0 | 0 | 0 | 13.78 | 13.39 | 12.72 |
2536 | 0.95 | 121.7 | 3039 | 1163 | 2909 | 2905 | 262.2 | 10.2 | 297 | 2544 | 0.00 | 2.65 | 0.00 | 0.000 | 1030 | 0.000 | 0.070 | 3039 | 2548 | 2906 | 2908 | 2905 | 0 | 0 | 0 | 0 | 0 | 0 | 13.66 | 13.59 | 13.67 |
2841 | 0.95 | 121.7 | 3039 | 2550 | 2903 | 2902 | 229.0 | 10.7 | 328 | 2842 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3037 | 2549 | 2901 | 2902 | 2901 | 0 | 0 | 0 | 0 | 0 | 0 | 14.41 | 14.41 | 14.41 |
3141 | 0.95 | 121.7 | 3039 | 2550 | 2902 | 2901 | 198.5 | 9.9 | 358 | 3142 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3039 | 2549 | 2900 | 2901 | 2900 | 0 | 0 | 0 | 0 | 0 | 0 | 14.63 | 14.63 | 14.63 |
3441 | 0.95 | 121.7 | 3040 | 2549 | 2903 | 2900 | 167.4 | 10.6 | 388 | 3442 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3038 | 2549 | 2900 | 2901 | 2900 | 0 | 0 | 0 | 0 | 0 | 0 | 14.73 | 14.73 | 14.72 |
3741 | 0.95 | 121.7 | 3039 | 2550 | 2902 | 2901 | 137.9 | 10.0 | 418 | 3747 | 0.00 | 2.47 | 0.00 | 0.000 | 516 | 0.000 | 0.066 | 3049 | 1155 | 2900 | 2901 | 2899 | 0 | 0 | 0 | 0 | 0 | 0 | 14.78 | 14.45 | 14.78 |
3766 | 0.95 | 121.7 | 3050 | 1155 | 2910 | 2899 | 135.4 | 9.9 | 423 | 3773 | 0.00 | 2.50 | 0.00 | 0.000 | 1030 | 0.000 | 0.070 | 3050 | 2554 | 2899 | 2900 | 2898 | 0 | 0 | 0 | 0 | 0 | 0 | 14.54 | 14.47 | 14.58 |
4072 | 0.95 | 121.7 | 3050 | 2555 | 2902 | 2899 | 106.3 | 8.8 | 454 | 4073 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3050 | 2554 | 2900 | 2901 | 2899 | 0 | 0 | 0 | 0 | 0 | 0 | 14.78 | 14.77 | 14.77 |
4371 | 0.95 | 121.7 | 3050 | 2554 | 2902 | 2899 | 77.9 | 9.3 | 484 | 4377 | 0.00 | 2.45 | 0.00 | 0.000 | 516 | 0.000 | 0.065 | 3059 | 1163 | 2900 | 2901 | 2899 | 0 | 0 | 0 | 0 | 0 | 0 | 14.84 | 14.50 | 14.84 |
4431 | 0.95 | 121.7 | 3059 | 1162 | 2902 | 2898 | 72.3 | 9.6 | 496 | 4437 | 0.00 | 2.47 | 0.00 | 0.000 | 1030 | 0.000 | 0.071 | 3059 | 2554 | 2900 | 2901 | 2899 | 0 | 0 | 0 | 0 | 0 | 0 | 14.59 | 14.52 | 14.63 |
4741 | 0.95 | 121.7 | 3059 | 2554 | 2902 | 2899 | 40.4 | 11.0 | 528 | 4742 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 3059 | 2554 | 2900 | 2902 | 2898 | 0 | 0 | 0 | 0 | 0 | 0 | 14.85 | 14.85 | 14.85 |
5041 | 0.95 | 121.7 | 3059 | 2555 | 2902 | 2900 | 9.6 | 11.5 | 558 | 5047 | 0.00 | 2.42 | 0.00 | 0.000 | 516 | 0.000 | 0.068 | 3068 | 1157 | 2900 | 2901 | 2899 | 0 | 0 | 0 | 0 | 0 | 0 | 14.87 | 14.54 | 14.87 |
5112 | 0.95 | 121.7 | 3069 | 1158 | 2902 | 2901 | 2.4 | 11.2 | 572 | 5117 | 0.15 | 2.42 | 0.00 | 0.000 | 5126 | 0.273 | 0.070 | 3037 | 2553 | 2900 | 2901 | 2899 | 0 | 0 | 0 | 0 | 0 | 0 | 14.35 | 14.57 | 14.64 |
5120 | end climb: SURFACE_DEPTH_REACHED | ||||||||||||||||||||||||||||||
state | 5120 | begin surface coast | |||||||||||||||||||||||||||||
5130 | end surface coast: CONTROL_FINISHED_OK | ||||||||||||||||||||||||||||||
state | 5130 | begin surface |