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 | 72 | 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 | -26178.092 | 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 | 71 |
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 |   153852,4806.952,-12222.759,19,1.1,19,18.0 | TGT_NAME |   EIGHT |
_CALLS |   1 | TGT_LATLONG |   4808.000,-12224.000 |
_XMS_NAKs |   0 | TGT_RADIUS |   200.000 |
_XMS_TOUTs |   0 | KALMAN_CONTROL |   -0.114,0.126 |
_SM_DEPTHo |   -0.00 | KALMAN_X |   10476.1,17.8,-22.8,-9463.1,76.4 |
_SM_ANGLEo |   -50.0 | KALMAN_Y |   -6943.9,1.8,13.9,5484.1,-31.1 |
GPS2 |   154311,4806.936,-12222.777,19,1.1,19,18.0 | MHEAD_RNG_PITCHd_Wd |   299.8,2483,-13.2,-6.000 |
SPEED_LIMITS |   0.060,0.170 | D_GRID |   100 |
Post-dive calculations and measurements:
FINISH |   0.7,0.997112 | AR_CDRIVE_SIZE |   4223664128 |
SM_CCo |   2839,175.10,0.004,23,0,1044,350.04 | AR_DDRIVE_FREE |   37963563008 |
SM_GC |   -0.00,0.00,0.00,175.10,0.000,0.000,0.004,147,2182,1044,-11.72,3.14,350.04 | AR_DDRIVE_SIZE |   59996930048 |
IRIDIUM_FIX |   0.00,0.00,010170,000000 | _24V_AH |   23.8,7.004 |
TT8_MAMPS |   0.04602 | _10V_AH |   9.6,14.743 |
HUMID |   1605 | DATA_FILE_SIZE |   6468,251 |
INTERNAL_PRESSURE |   12.5102 | CAP_FILE_SIZE |   75208,8 |
TCM_TEMP |   15.00 | CFSIZE |   260165632,257298432 |
AR_POSTDIVE_SAMPLENUM |   4 | ERRORS |   0,0,0,0,0,0,0,0,1,0,0,83,196,23,0 |
AR_CDRIVE_FREE |   4122574848 | GPS |   280708,163707,4807.192,-12223.004,6,1.1,7,18.0 |
Energy measurements:
device | secs | mA | J | sensor | secs | mA | J |
Pitch_motor | 41 | 4 | 4.54 | SBE_CT | 195 | 24 | 111.57 |
Roll_motor | 49 | 3 | 4.50 | nil | 0 | 0 | 0.00 |
VBD_pump_during_apogee | 242 | 4 | 26.58 | nil | 0 | 0 | 0.00 |
VBD_pump_during_surface | 175 | 3 | 15.98 | 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 | 3260 | 216 | 16780.97 |
Iridium_during_xfer | 101 | 223 | 537.47 | ||||
Transponder_ping | 0 | 0 | 0.00 | ||||
GUMSTIX_24V | 0 | 0 | 0.00 | ||||
GPS | 19 | 50 | 9.58 | ||||
TT8 | 551 | 18 | 95.30 | ||||
LPSleep | 1495 | 0 | 5.60 | ||||
TT8_Active | 692 | 18 | 119.68 | ||||
TT8_Sampling | 311 | 38 | 113.46 | ||||
TT8_CF8 | 348 | 44 | 147.11 | ||||
TT8_Kalman | 33 | 80 | 25.61 | ||||
Analog_circuits | 1019 | 12 | 117.42 | ||||
GPS_charging | 0 | 0 | 0.00 | ||||
Compass | 271 | 26 | 67.70 | ||||
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 | 97 | 0.00 | 0.00 | -67.30 | 0.000 | 6 | 0.000 | 0.000 | 146 | 2158 | 3078 |
100 | -1.00 | -146.6 | 0.6 | -0.7 | 7 | 121 | 11.95 | 2.45 | 0.00 | 0.000 | 4 | 0.004 | 0.004 | 2505 | 3669 | 3078 |
126 | -1.00 | -146.6 | 5.0 | -20.5 | 9 | 133 | 0.30 | 2.78 | 0.00 | 0.000 | 6 | 0.003 | 0.004 | 2427 | 1933 | 3076 |
164 | -1.00 | -146.6 | 12.1 | -19.5 | 13 | 170 | 0.35 | 2.88 | 0.00 | 0.000 | 4 | 0.004 | 0.004 | 2508 | 3591 | 3077 |
242 | -1.00 | -146.6 | 18.7 | -8.1 | 19 | 250 | 0.30 | 3.05 | 0.00 | 0.000 | 6 | 0.004 | 0.004 | 2436 | 1918 | 3077 |
280 | -1.00 | -146.6 | 21.7 | -8.0 | 23 | 282 | 0.30 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2515 | 1917 | 3077 |
312 | -1.00 | -146.6 | 24.1 | -7.5 | 26 | 314 | 0.30 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2444 | 1919 | 3077 |
344 | -1.00 | -146.6 | 26.5 | -7.5 | 29 | 346 | 0.30 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2514 | 1918 | 3076 |
376 | -1.00 | -146.6 | 28.8 | -7.3 | 32 | 378 | 0.30 | 0.00 | 0.00 | 0.000 | 6 | 0.005 | 0.000 | 2442 | 1917 | 3076 |
408 | -1.00 | -146.6 | 31.1 | -7.2 | 35 | 414 | 0.40 | 2.83 | 0.00 | 0.000 | 4 | 0.004 | 0.004 | 2514 | 3587 | 3076 |
549 | -1.00 | -146.6 | 41.3 | -7.3 | 47 | 555 | 0.30 | 2.95 | 0.00 | 0.000 | 6 | 0.003 | 0.003 | 2442 | 1928 | 3078 |
587 | -1.00 | -146.6 | 43.9 | -7.0 | 50 | 589 | 0.32 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2520 | 1927 | 3077 |
618 | -1.00 | -146.6 | 46.1 | -7.0 | 53 | 620 | 0.40 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2443 | 1927 | 3077 |
650 | -1.00 | -146.6 | 48.3 | -6.7 | 56 | 652 | 0.30 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2521 | 1929 | 3077 |
682 | -1.00 | -146.6 | 50.4 | -6.7 | 59 | 684 | 0.32 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2481 | 1927 | 3076 |
713 | -1.00 | -146.6 | 52.6 | -6.8 | 62 | 715 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2482 | 1928 | 3076 |
745 | -1.00 | -146.6 | 54.8 | -7.0 | 65 | 747 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2481 | 1927 | 3075 |
777 | -1.00 | -146.6 | 57.0 | -6.8 | 68 | 778 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2481 | 1927 | 3076 |
809 | -1.00 | -146.6 | 59.1 | -6.7 | 71 | 810 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2483 | 1927 | 3077 |
841 | -1.00 | -146.6 | 61.3 | -6.7 | 74 | 842 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2481 | 1928 | 3077 |
873 | -1.00 | -146.6 | 63.5 | -6.8 | 77 | 874 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2482 | 1929 | 3079 |
905 | -1.00 | -146.6 | 65.6 | -6.7 | 80 | 906 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2481 | 1927 | 3077 |
937 | -1.00 | -146.6 | 67.7 | -6.6 | 83 | 938 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2481 | 1927 | 3077 |
968 | -1.00 | -146.6 | 69.9 | -6.8 | 86 | 969 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2481 | 1928 | 3077 |
1000 | -1.00 | -146.6 | 72.0 | -6.7 | 89 | 1005 | 0.00 | 2.80 | 0.00 | 0.000 | 4 | 0.000 | 0.004 | 2481 | 3596 | 3078 |
1095 | -1.00 | -146.6 | 78.6 | -7.6 | 97 | 1100 | 0.00 | 2.78 | 0.00 | 0.000 | 6 | 0.000 | 0.004 | 2481 | 1963 | 3078 |
1133 | -1.00 | -146.6 | 81.3 | -7.3 | 100 | 1134 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2481 | 1965 | 3077 |
1165 | -1.00 | -146.6 | 83.3 | -6.5 | 103 | 1166 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2481 | 1963 | 3077 |
1196 | -1.00 | -146.6 | 85.5 | -7.0 | 106 | 1197 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2482 | 1963 | 3076 |
1228 | -1.00 | -146.6 | 87.6 | -6.6 | 109 | 1230 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2481 | 1963 | 3077 |
1260 | -1.00 | -146.6 | 89.7 | -6.6 | 112 | 1261 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2481 | 1964 | 3077 |
1268 | end dive: TARGET_DEPTH_EXCEEDED | |||||||||||||||
state | 1268 | begin apogee | ||||||||||||||
1275 | -0.31 | 0.0 | 90.4 | 6.5 | 113 | 1402 | 1.00 | 0.00 | 122.05 | 0.005 | 6 | 0.004 | 0.000 | 2663 | 2170 | 2473 |
1403 | end apogee: CONTROL_FINISHED_OK | |||||||||||||||
state | 1403 | begin climb | ||||||||||||||
1406 | 1.00 | 146.6 | 92.4 | 0.0 | 126 | 1532 | 1.30 | 0.00 | 120.65 | 0.005 | 6 | 0.004 | 0.000 | 2935 | 2169 | 1876 |
1559 | 1.00 | 146.6 | 84.2 | 7.2 | 141 | 1561 | 0.30 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2859 | 2168 | 1876 |
1591 | 1.00 | 146.6 | 82.1 | 6.8 | 144 | 1593 | 0.30 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2936 | 2169 | 1875 |
1623 | 1.00 | 146.6 | 79.8 | 7.0 | 147 | 1625 | 0.40 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2858 | 2168 | 1876 |
1654 | 1.00 | 146.6 | 77.7 | 6.8 | 150 | 1657 | 0.55 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2972 | 2169 | 1875 |
1687 | 1.00 | 146.6 | 75.6 | 6.7 | 153 | 1689 | 0.45 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2855 | 2168 | 1876 |
1718 | 1.00 | 146.6 | 73.4 | 6.8 | 156 | 1724 | 0.68 | 2.33 | 0.00 | 0.000 | 4 | 0.004 | 0.004 | 2966 | 3597 | 1875 |
1872 | 1.00 | 146.6 | 62.5 | 8.0 | 169 | 1878 | 0.47 | 2.90 | 0.00 | 0.000 | 6 | 0.003 | 0.004 | 2853 | 1963 | 1876 |
1910 | 1.00 | 146.6 | 59.6 | 7.4 | 172 | 1912 | 0.45 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2966 | 1959 | 1875 |
1942 | 1.00 | 146.6 | 57.4 | 7.2 | 175 | 1944 | 0.50 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2853 | 1958 | 1875 |
1973 | 1.00 | 146.6 | 55.1 | 7.1 | 178 | 1976 | 0.57 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2965 | 1959 | 1875 |
2005 | 1.00 | 146.6 | 52.8 | 7.1 | 181 | 2008 | 0.50 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2858 | 1959 | 1874 |
2037 | 1.00 | 146.6 | 50.6 | 6.9 | 184 | 2039 | 0.50 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2968 | 1960 | 1875 |
2069 | 1.00 | 146.6 | 48.3 | 7.2 | 187 | 2072 | 0.52 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2858 | 1959 | 1874 |
2101 | 1.00 | 146.6 | 46.1 | 6.8 | 190 | 2103 | 0.55 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2970 | 1959 | 1875 |
2133 | 1.00 | 146.6 | 43.9 | 7.1 | 193 | 2135 | 0.47 | 0.00 | 0.00 | 0.000 | 6 | 0.004 | 0.000 | 2857 | 1960 | 1875 |
2165 | 1.00 | 146.6 | 41.9 | 6.5 | 196 | 2170 | 0.47 | 2.42 | 0.00 | 0.000 | 4 | 0.004 | 0.004 | 2933 | 508 | 1875 |
2351 | 1.00 | 146.6 | 29.7 | 6.3 | 212 | 2357 | 0.30 | 2.85 | 0.00 | 0.000 | 6 | 0.004 | 0.004 | 2856 | 2163 | 1874 |
2389 | 1.00 | 146.6 | 27.1 | 6.8 | 215 | 2391 | 0.60 | 0.00 | 0.00 | 0.000 | 6 | 0.003 | 0.000 | 2927 | 2163 | 1875 |
2421 | 1.00 | 146.6 | 25.0 | 6.7 | 218 | 2422 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2929 | 2163 | 1874 |
2452 | 1.00 | 146.6 | 22.9 | 6.7 | 221 | 2457 | 0.00 | 2.35 | 0.00 | 0.000 | 4 | 0.000 | 0.004 | 2927 | 3604 | 1876 |
2604 | 1.00 | 146.6 | 12.5 | 7.4 | 234 | 2609 | 0.00 | 2.67 | 0.00 | 0.000 | 6 | 0.000 | 0.004 | 2927 | 1955 | 1874 |
2641 | 1.00 | 146.6 | 10.1 | 6.7 | 237 | 2643 | 0.00 | 0.00 | 0.00 | 0.000 | 6 | 0.000 | 0.000 | 2928 | 1955 | 1875 |
2673 | 1.00 | 146.6 | 8.0 | 6.5 | 240 | 2678 | 0.00 | 2.85 | 0.00 | 0.000 | 4 | 0.000 | 0.004 | 2926 | 3599 | 1875 |
2717 | 1.00 | 146.6 | 5.3 | 6.2 | 243 | 2723 | 0.00 | 2.78 | 0.00 | 0.000 | 6 | 0.000 | 0.004 | 2927 | 1973 | 1875 |
2755 | 1.00 | 146.6 | 2.8 | 6.8 | 247 | 2759 | 0.00 | 2.47 | 0.00 | 0.000 | 4 | 0.000 | 0.004 | 2927 | 544 | 1876 |
2773 | end climb: SURFACE_DEPTH_REACHED | |||||||||||||||
state | 2773 | begin surface coast | ||||||||||||||
2807 | end surface coast: CONTROL_FINISHED_OK | |||||||||||||||
state | 2808 | begin surface |