Parameter values: Sort by alphabetical glider order
ID | 80 | TGT_DEFAULT_LAT | 47.599998 | R_STBD_OVSHOOT | 1 | DEVICE3 | -1 |
MISSION | 11 | TGT_DEFAULT_LON | -122.3 | ROLL_AD_RATE | 400 | DEVICE4 | -1 |
DIVE | 122 | TGT_AUTO_DEFAULT | 0 | ROLL_MAXERRORS | 10 | DEVICE5 | -1 |
D_SURF | 2 | SM_CC | 350 | ROLL_ADJ_GAIN | 0 | DEVICE6 | -1 |
D_FLARE | 3 | N_FILEKB | 4 | ROLL_ADJ_DBAND | 0 | SMARTS | 1 |
D_TGT | 90 | FILEMGR | 0 | VBD_MIN | 188 | SMARTDEVICE1 | 3 |
D_ABORT | 1090 | CALL_NDIVES | 1 | VBD_MAX | 3616 | SMARTDEVICE2 | -1 |
D_NO_BLEED | 200 | COMM_SEQ | 0 | C_VBD | 2473 | COMPASS_DEVICE | 1 |
D_BOOST | 0 | KERMIT | 0 | VBD_DBAND | 2 | COMPASS2_DEVICE | -1 |
D_FINISH | 0 | N_NOCOMM | 1 | VBD_CNV | -0.24529999 | PHONE_DEVICE | 32 |
D_PITCH | 0 | N_NOSURFACE | 0 | VBD_TIMEOUT | 360 | GPS_DEVICE | 48 |
D_SAFE | 0 | UPLOAD_DIVES_MAX | -1 | PITCH_VBD_SHIFT | 0.0012300001 | RAFOS_DEVICE | -1 |
D_CALL | 0 | CALL_TRIES | 5 | VBD_PUMP_AD_RATE_SURFACE | 6 | XPDR_DEVICE | -1 |
SURFACE_URGENCY | 0 | CALL_WAIT | 60 | VBD_PUMP_AD_RATE_APOGEE | 4 | SIM_W | 0 |
SURFACE_URGENCY_TRY | 0 | CAPUPLOAD | 0 | VBD_BLEED_AD_RATE | 8 | SIM_PITCH | 0 |
SURFACE_URGENCY_FORCE | 0 | CAPMAXSIZE | 100000 | UNCOM_BLEED | 20 | SEABIRD_T_G | 0.0043805656 |
T_DIVE | 50 | HEAPDBG | 0 | VBD_MAXERRORS | 1 | SEABIRD_T_H | 0.00064742006 |
T_MISSION | 65 | T_GPS | 15 | CF8_MAXERRORS | 0 | SEABIRD_T_I | 2.5554549e-05 |
T_ABORT | 1440 | N_GPS | 20 | AH0_24V | 91.800003 | SEABIRD_T_J | 2.6681391e-06 |
T_TURN | 270 | T_GPS_ALMANAC | 0 | AH0_10V | 61.200001 | SEABIRD_C_G | -10.331019 |
T_TURN_SAMPINT | 5 | T_GPS_CHARGE | -27408.062 | PHONE_SUPPLY | 2 | SEABIRD_C_H | 1.1763502 |
T_NO_W | 120 | T_RSLEEP | 3 | PRESSURE_YINT | -0.16054545 | SEABIRD_C_I | -0.0012340198 |
T_LOITER | 0 | RAFOS_PEAK_OFFSET | 1.5 | PRESSURE_SLOPE | 9.9999997e-05 | SEABIRD_C_J | 0.00017379176 |
USE_BATHY | -4 | RAFOS_CORR_THRESH | 60 | AD7714Ch0Gain | 1 | AR_RESETARS | 0.0 |
USE_ICE | 0 | RAFOS_HIT_WINDOW | 3600 | TCM_PITCH_OFFSET | 0 | AR_RECORDBELOW | 0.0 |
ICE_FREEZE_MARGIN | 0.30000001 | PITCH_MIN | 30 | TCM_ROLL_OFFSET | 0 | AR_NOTIFYAPOGEE | 0.0 |
D_OFFGRID | 100 | PITCH_MAX | 4065 | COMPASS_USE | 0 | AR_DIVENUM | 121 |
T_WATCHDOG | 10 | C_PITCH | 2692 | ALTIM_BOTTOM_PING_RANGE | 25 | AR_SAMPLENUM | 4 |
RELAUNCH | 1 | PITCH_DBAND | 0.1 | ALTIM_TOP_PING_RANGE | 0 | AR_OUTLEVEL | 2 |
APOGEE_PITCH | -5 | PITCH_CNV | 0.0046000001 | ALTIM_BOTTOM_TURN_MARGIN | 0 | AR_LOGFILE | C:\ARS.LOG |
MAX_BUOY | 150 | P_OVSHOOT | 0.039999999 | ALTIM_TOP_TURN_MARGIN | 0 | AR_FGSLOPE | 0.0033 |
COURSE_BIAS | 0 | PITCH_GAIN | 16 | ALTIM_TOP_MIN_OBSTACLE | 1 | AR_FGYINT | -0.045 |
GLIDE_SLOPE | 45 | PITCH_TIMEOUT | 15 | ALTIM_PING_DEPTH | 80 | AR_FORCETOHOST | 0 |
SPEED_FACTOR | 1 | PITCH_AD_RATE | 175 | ALTIM_PING_DELTA | 10 | AR_WARMUP | 20 |
RHO | 1.023 | PITCH_MAXERRORS | 10 | ALTIM_FREQUENCY | 13 | AR_UPLOADEXTS | PSD |
MASS | 52000 | PITCH_ADJ_GAIN | 0 | ALTIM_PULSE | 3 | AR_HEAPDBG | 0 |
NAV_MODE | 1 | PITCH_ADJ_DBAND | 0 | ALTIM_SENSITIVITY | 2 | AR_ARSMODEL | 3 |
FERRY_MAX | 45 | ROLL_MIN | 300 | XPDR_VALID | 0 | AR_ARSSERIAL | 5 |
KALMAN_USE | 1 | ROLL_MAX | 3750 | XPDR_INHIBIT | 90 | AR_ARSCH1GAIN | 200 |
HD_A | 0.0041149999 | ROLL_DEG | 40 | INT_PRESSURE_SLOPE | 0.0097660003 | AR_ARSCH2GAIN | 0 |
HD_B | 0.014024 | C_ROLL_DIVE | 2069 | INT_PRESSURE_YINT | 0 | AR_ARSCH1FLT | 30000 |
HD_C | 5.5727e-05 | C_ROLL_CLIMB | 2069 | DEEPGLIDER | 0 | AR_ARSCH2FLT | 1200 |
HEADING | -1 | HEAD_ERRBAND | 10 | DEEPGLIDERMB | 0 | AR_FGCLKCORR | 0.940588 |
ESCAPE_HEADING | 0 | ROLL_CNV | 0.028270001 | MOTHERBOARD | 4 | AR_CHKOPENFILES | 1 |
ESCAPE_HEADING_DELTA | 10 | ROLL_TIMEOUT | 15 | DEVICE1 | 2 | AR_EPOCHTS | 1 |
FIX_MISSING_TIMEOUT | 0 | R_PORT_OVSHOOT | 1 | DEVICE2 | -1 |
Pre-dive calculations and measurements:
GPS1 |   151621,4806.027,-12221.849,32,1.1,32,18.0 | TGT_NAME |   EIGHT |
_CALLS |   1 | TGT_LATLONG |   4808.000,-12224.000 |
_XMS_NAKs |   0 | TGT_RADIUS |   200.000 |
_XMS_TOUTs |   0 | KALMAN_CONTROL |   -0.117,0.123 |
_SM_DEPTHo |   -0.00 | KALMAN_X |   13779.7,60.6,-95.9,-11572.2,106.7 |
_SM_ANGLEo |   -50.0 | KALMAN_Y |   -5212.4,-92.7,160.8,1964.1,-32.7 |
GPS2 |   152050,4805.998,-12221.834,37,1.1,37,18.0 | MHEAD_RNG_PITCHd_Wd |   298.6,4573,-13.2,-6.000 |
SPEED_LIMITS |   0.060,0.170 | D_GRID |   100 |
Post-dive calculations and measurements:
FINISH |   0.3,0.996912 | AR_CDRIVE_SIZE |   4223664128 |
SM_CCo |   2869,172.12,0.004,23,0,1045,350.04 | AR_DDRIVE_FREE |   20517617664 |
SM_GC |   -0.00,0.00,0.00,172.12,0.000,0.000,0.004,147,2085,1045,-11.72,0.51,350.04 | AR_DDRIVE_SIZE |   59996930048 |
IRIDIUM_FIX |   0.00,0.00,010170,000000 | _24V_AH |   23.8,12.213 |
TT8_MAMPS |   0.04602 | _10V_AH |   9.6,25.426 |
HUMID |   1578 | DATA_FILE_SIZE |   6455,258 |
INTERNAL_PRESSURE |   12.5688 | CAP_FILE_SIZE |   71474,8 |
TCM_TEMP |   15.00 | CFSIZE |   260165632,255688704 |
AR_POSTDIVE_SAMPLENUM |   4 | ERRORS |   0,0,0,0,0,0,0,0,1,0,0,85,131,23,0 |
AR_CDRIVE_FREE |   4122574848 | GPS |   300708,161521,4806.216,-12222.028,14,1.1,14,18.0 |
Energy measurements:
device | secs | mA | J | sensor | secs | mA | J |
Pitch_motor | 38 | 3 | 3.49 | SBE_CT | 201 | 24 | 115.22 |
Roll_motor | 32 | 3 | 2.95 | nil | 0 | 0 | 0.00 |
VBD_pump_during_apogee | 248 | 4 | 27.18 | nil | 0 | 0 | 0.00 |
VBD_pump_during_surface | 172 | 3 | 15.71 | nil | 0 | 0 | 0.00 |
VBD_valve | 0 | 0 | 0.00 | nil | 0 | 0 | 0.00 |
Iridium_during_init | 0 | 103 | 0.00 | nil | 0 | 0 | 0.00 |
Iridium_during_connect | 0 | 0 | 0.00 | ARS | 3311 | 216 | 17041.56 |
Iridium_during_xfer | 91 | 223 | 483.58 | ||||
Transponder_ping | 0 | 0 | 0.00 | ||||
GUMSTIX_24V | 0 | 0 | 0.00 | ||||
GPS | 39 | 50 | 19.11 | ||||
TT8 | 548 | 18 | 94.78 | ||||
LPSleep | 1545 | 0 | 5.79 | ||||
TT8_Active | 674 | 18 | 116.52 | ||||
TT8_Sampling | 326 | 38 | 119.26 | ||||
TT8_CF8 | 341 | 44 | 144.38 | ||||
TT8_Kalman | 33 | 80 | 25.61 | ||||
Analog_circuits | 998 | 12 | 115.03 | ||||
GPS_charging | 0 | 0 | 0.00 | ||||
Compass | 270 | 26 | 67.48 | ||||
RAFOS | 0 | 0 | 0.00 | ||||
Transponder | 0 | 0 | 0.00 | ||||
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 |
22 | end surface: CONTROL_FINISHED_OK | |||||||||||||||
state | 22 | begin dive | ||||||||||||||
25 | -1.00 | -146.6 | 0.0 | 0.0 | 0 | 95 | 0.00 | 0.00 | -67.12 | 0.000 | 6 | 0.000 | 0.000 | 146 | 1880 | 3079 |
99 | -1.00 | -146.6 | 0.6 | -1.0 | 7 | 114 | 11.82 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2533 | 1882 | 3079 |
146 | -1.00 | -146.6 | 9.7 | -22.2 | 12 | 148 | 0.55 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2420 | 1882 | 3080 |
178 | -1.00 | -146.6 | 13.6 | -16.6 | 15 | 180 | 0.55 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2529 | 1881 | 3080 |
210 | -1.00 | -146.6 | 16.0 | -7.9 | 18 | 212 | 0.55 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2415 | 1879 | 3079 |
242 | -1.00 | -146.6 | 18.3 | -7.2 | 21 | 244 | 0.55 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2528 | 1880 | 3079 |
274 | -1.00 | -146.6 | 20.6 | -7.2 | 24 | 276 | 0.68 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2417 | 1881 | 3080 |
305 | -1.00 | -146.6 | 22.7 | -6.8 | 27 | 308 | 0.55 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2526 | 1882 | 3079 |
337 | -1.00 | -146.6 | 25.0 | -7.2 | 30 | 340 | 0.60 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2416 | 1883 | 3079 |
369 | -1.00 | -146.6 | 27.1 | -6.6 | 33 | 371 | 0.45 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2525 | 1881 | 3080 |
401 | -1.00 | -146.6 | 29.3 | -6.9 | 36 | 404 | 0.57 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2416 | 1880 | 3079 |
433 | -1.00 | -146.6 | 31.5 | -6.6 | 39 | 435 | 0.47 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2528 | 1881 | 3079 |
465 | -1.00 | -146.6 | 33.7 | -7.0 | 42 | 467 | 0.57 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2413 | 1881 | 3079 |
496 | -1.00 | -146.6 | 35.8 | -6.8 | 45 | 499 | 0.47 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2529 | 1881 | 3079 |
530 | -1.00 | -146.6 | 38.0 | -7.0 | 48 | 532 | 0.55 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2415 | 1881 | 3080 |
560 | -1.00 | -146.6 | 40.1 | -6.7 | 51 | 562 | 0.60 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2530 | 1881 | 3079 |
592 | -1.00 | -146.6 | 42.2 | -6.7 | 54 | 594 | 0.60 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2456 | 1881 | 3080 |
623 | -1.00 | -146.6 | 44.2 | -6.3 | 57 | 628 | 0.00 | 2.95 | 0.00 | 0.000 | 4 | 0.000 | 0.004 | 2457 | 3628 | 3079 |
707 | -1.00 | -146.6 | 49.8 | -6.8 | 64 | 712 | 0.00 | 2.97 | 0.00 | 0.000 | 6 | 0.000 | 0.004 | 2458 | 1892 | 3080 |
745 | -1.00 | -146.6 | 52.2 | -6.7 | 67 | 746 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2454 | 1892 | 3080 |
777 | -1.00 | -146.6 | 54.3 | -6.7 | 70 | 778 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2456 | 1892 | 3080 |
808 | -1.00 | -146.6 | 56.4 | -6.6 | 73 | 810 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2457 | 1892 | 3080 |
840 | -1.00 | -146.6 | 58.5 | -6.3 | 76 | 841 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2456 | 1891 | 3078 |
872 | -1.00 | -146.6 | 60.7 | -6.8 | 79 | 877 | 0.00 | 2.25 | 0.00 | 0.000 | 4 | 0.000 | 0.004 | 2454 | 549 | 3079 |
1085 | -1.00 | -146.6 | 74.7 | -6.4 | 97 | 1091 | 0.00 | 2.97 | 0.00 | 0.000 | 6 | 0.000 | 0.004 | 2455 | 2214 | 3080 |
1123 | -1.00 | -146.6 | 77.3 | -7.0 | 101 | 1124 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2456 | 2216 | 3079 |
1155 | -1.00 | -146.6 | 79.3 | -6.5 | 104 | 1156 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2455 | 2213 | 3080 |
1187 | -1.00 | -146.6 | 81.4 | -6.6 | 107 | 1188 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2457 | 2214 | 3081 |
1218 | -1.00 | -146.6 | 83.4 | -6.3 | 110 | 1223 | 0.00 | 2.25 | 0.00 | 0.000 | 4 | 0.000 | 0.004 | 2457 | 3563 | 3079 |
1327 | end dive: TARGET_DEPTH_EXCEEDED | |||||||||||||||
state | 1327 | begin apogee | ||||||||||||||
1337 | -0.31 | 0.0 | 90.3 | 6.0 | 119 | 1464 | 1.08 | 0.00 | 122.53 | 0.005 | 6 | 0.004 | 0.000 | 2681 | 1933 | 2472 |
1465 | end apogee: CONTROL_FINISHED_OK | |||||||||||||||
state | 1465 | begin climb | ||||||||||||||
1468 | 1.00 | 146.6 | 91.8 | 0.0 | 132 | 1594 | 1.40 | 0.00 | 120.43 | 0.005 | 6 | 0.004 | 0.000 | 2940 | 1934 | 1875 |
1622 | 1.00 | 146.6 | 82.8 | 7.6 | 147 | 1624 | 0.38 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2866 | 1933 | 1875 |
1653 | 1.00 | 146.6 | 80.4 | 7.4 | 150 | 1655 | 0.30 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2942 | 1934 | 1874 |
1685 | 1.00 | 146.6 | 78.0 | 7.6 | 153 | 1688 | 0.40 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2870 | 1932 | 1875 |
1717 | 1.00 | 146.6 | 75.7 | 7.3 | 156 | 1719 | 0.32 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2906 | 1932 | 1875 |
1749 | 1.00 | 146.6 | 73.3 | 7.1 | 159 | 1754 | 0.00 | 2.97 | 0.00 | 0.000 | 4 | 0.000 | 0.004 | 2906 | 3599 | 1876 |
1956 | 1.00 | 146.6 | 58.5 | 8.2 | 177 | 1961 | 0.00 | 2.65 | 0.00 | 0.000 | 6 | 0.000 | 0.004 | 2906 | 1928 | 1875 |
1994 | 1.00 | 146.6 | 55.8 | 7.2 | 180 | 1998 | 0.00 | 2.28 | 0.00 | 0.000 | 4 | 0.000 | 0.004 | 2907 | 559 | 1876 |
2149 | 1.00 | 146.6 | 44.9 | 7.1 | 193 | 2155 | 0.00 | 2.85 | 0.00 | 0.000 | 6 | 0.000 | 0.004 | 2905 | 2214 | 1875 |
2187 | 1.00 | 146.6 | 42.3 | 7.2 | 197 | 2188 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2905 | 2215 | 1875 |
2219 | 1.00 | 146.6 | 40.2 | 6.7 | 200 | 2220 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2907 | 2215 | 1875 |
2251 | 1.00 | 146.6 | 38.0 | 6.7 | 203 | 2252 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2905 | 2215 | 1875 |
2283 | 1.00 | 146.6 | 35.9 | 6.8 | 206 | 2284 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2908 | 2215 | 1875 |
2315 | 1.00 | 146.6 | 33.7 | 6.9 | 209 | 2316 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2905 | 2216 | 1877 |
2346 | 1.00 | 146.6 | 31.6 | 6.6 | 212 | 2348 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2907 | 2216 | 1875 |
2378 | 1.00 | 146.6 | 29.5 | 6.7 | 215 | 2380 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2905 | 2215 | 1876 |
2410 | 1.00 | 146.6 | 27.3 | 6.8 | 218 | 2411 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2906 | 2216 | 1874 |
2442 | 1.00 | 146.6 | 25.3 | 6.3 | 221 | 2446 | 0.00 | 2.28 | 0.00 | 0.000 | 4 | 0.000 | 0.004 | 2904 | 3638 | 1875 |
2486 | 1.00 | 146.6 | 22.3 | 7.2 | 224 | 2492 | 0.00 | 2.85 | 0.00 | 0.000 | 6 | 0.000 | 0.004 | 2907 | 1975 | 1875 |
2524 | 1.00 | 146.6 | 19.8 | 6.8 | 228 | 2525 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2906 | 1976 | 1875 |
2556 | 1.00 | 146.6 | 17.6 | 6.8 | 231 | 2557 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2905 | 1974 | 1875 |
2588 | 1.00 | 146.6 | 15.5 | 6.6 | 234 | 2589 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2906 | 1974 | 1876 |
2620 | 1.00 | 146.6 | 13.4 | 6.7 | 237 | 2621 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2908 | 1975 | 1876 |
2651 | 1.00 | 146.6 | 11.4 | 6.5 | 240 | 2652 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2906 | 1976 | 1875 |
2683 | 1.00 | 146.6 | 9.3 | 6.5 | 243 | 2684 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2905 | 1975 | 1875 |
2715 | 1.00 | 146.6 | 7.2 | 6.6 | 246 | 2716 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2907 | 1975 | 1875 |
2747 | 1.01 | 151.4 | 5.3 | 5.8 | 249 | 2757 | 0.00 | 0.00 | 5.20 | 0.004 | 6 | 0.000 | 0.000 | 2907 | 1974 | 1854 |
2789 | 1.01 | 151.4 | 2.7 | 6.6 | 253 | 2790 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2907 | 1975 | 1852 |
2807 | end climb: SURFACE_DEPTH_REACHED | |||||||||||||||
state | 2807 | begin surface coast | ||||||||||||||
2840 | end surface coast: CONTROL_FINISHED_OK | |||||||||||||||
state | 2840 | begin surface |