<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-18 -108 05:30:00.000"
URSICode="SMK29"
StationName="Santa Maria"
GeoLatitude="-29.69"
GeoLongitude="307.81"
Source="Ionosonde"
SourceType="DPS-4D"
ScalerType="auto">
<SystemInfo UMLStationID="129">
<FrequencyStepping StartFrequency="2.0" StopFrequency="15.0">
<LinearStepping Step="0.025" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="2.5" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 85% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.18 (108) 05:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.20" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.98" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="78.74007" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202610804180530001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.899" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="10.917" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.025" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.025" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.125" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="222.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="222.500" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.025" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="250.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.025" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.025" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="226.503" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="210.429" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.374" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="22.942" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.514" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="12.204" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="22.490" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.290" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="32">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.025 2.05 2.075 2.1 2.125 2.15 2.175 2.2 2.225 2.25 2.275 2.3 2.325 2.35 2.375 2.4 2.425 2.45 2.475 2.5 2.525 2.55 2.575 2.6 2.625 2.65 2.675 2.7 2.725 2.75 2.775 2.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
222.500 222.500 222.500 223.750 225.000 225.000 225.000 225.000 227.500 228.750 230.000 231.250 232.500 233.500 234.500 235.500 236.500 237.500 237.500 240.000 240.000 240.000 242.500 245.000 245.000 247.500 247.500 250.000 253.980 260.414 272.579 304.287
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 72 0 75 0 0 84 60 0 45 0 57 0 0 0 0 72 63 63 66 63 0 66 78 75 63 60 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.5625 1.5625 1.5625 1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 1.5625 1.5625 -1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625 -1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="315">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 136.25 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 162.5 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 188.75 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 226.503 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21213934 0.23390245 0.2526677 0.26895854 0.28319094 0.29565945 0.30659118 0.31614733 0.32445762 0.331616 0.33769703 0.34275886 0.34684667 0.3499937 0.352225 0.3535571 0.354 0.353812 0.35332385 0.3524629 0.35123456 0.3496469 0.3477836 0.34551057 0.34284618 0.3398121 0.3363646 0.33256927 0.32832938 0.32366115 0.31855893 0.31297255 0.3068771 0.30027556 0.29307804 0.2853064 0.27685073 0.26765716 0.25764734 0.24675402 0.23483722 0.22173925 0.20734549 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.20293333 0.2088 0.21466666 0.22053333 0.2264 0.23226666 0.23813333 0.244 0.24986666 0.25573334 0.2616 0.26746666 0.27333334 0.2792 0.28506666 0.29093334 0.2968 0.30266666 0.30853334 0.3144 0.32026666 0.32613334 0.332 0.33786666 0.34373334 0.3496 0.354 0.3633494 0.40373656 0.44874692 0.49803334 0.55125684 0.608148 0.6685329 0.73232794 0.79952985 0.8701336 0.94420856 1.0217551 1.1027768 1.187177 1.2748122 1.3654121 1.4585654 1.5537447 1.6502526 1.7473222 1.8440671 1.939535 2.0328212 2.1230175 2.2093346 2.291081 2.3676798 2.4386733 2.5037093 2.5625553 2.6150324 2.6610372 2.7005022 2.733393 2.7597039 2.7794313 2.7925856 2.7991695 2.8 2.7995503 2.7959917 2.7890472 2.7789106 2.7657764 2.7498379 2.7312863 2.71031 2.6870928 2.661814 2.6346474 2.6057606 2.5753152 2.5434659 2.5103602 2.476139 2.4409363 2.4048786 2.3680851 2.330669 2.2927358 2.2543845 2.215708 2.1767929 2.1377194 2.0985618 2.0593896 2.0202663 1.9812505 1.942396 1.9037522 1.865364 1.827272 1.7895136 1.7521219 1.715127 1.6785557 1.6424319 1.6067766 1.5716082 1.5369428 1.5027944 1.4691745 1.436093 1.4035579 1.3715757 1.3401513 1.309288 1.2789882 1.2492529 1.220082 1.1914746 1.1634288 1.1359417 1.1090102 1.08263 1.0567966 1.0315045 1.0067484 0.9825219 0.9588187 0.93563193 0.9129545 0.8907792 0.8690983 0.84790426 0.8271892 0.806945 0.7871638 0.7678373 0.7489573 0.7305156 0.712504 0.69491434 0.6777382 0.6609675 0.64459413 0.62860996 0.61300695 0.5977772 0.5829127 0.5684058 0.5542487 0.5404339 0.52695376 0.513801 0.5009683 0.4884484 0.47623438 0.46431923 0.4526961 0.44135833 0.43029928 0.41951254 0.40899172 0.3987306 0.3887231 0.37896323 0.36944512 0.360163 0.3511113 0.34228447 0.3336771 0.32528394 0.31709984 0.30911973 0.30133867 0.2937518 0.28635442 0.27914193 0.2721098 0.26525357 0.258569 0.25205186 0.24569799 0.23950341 0.23346418 0.22757646 0.22183654 0.2162407 0.21078543 0.20546722 0.20028266 0.19522844 0.19030133 0.18549815 0.18081582 0.17625132 0.17180172 0.16746414 0.1632358 0.15911396 0.15509595 0.1511792 0.14736114 0.14363931 0.14001131 0.13647479 0.13302742 0.12966701 0.12639135 0.12319832 0.12008584 0.1170519 0.1140945 0.11121175 0.10840174 0.10566266 0.10299271 0.10039017 0.09785334 0.095380545 0.09297019 0.090620704 0.088330545 0.086098224 0.083922274 0.08180129 0.07973387 0.077718675 0.07575438 0.07383971 0.071973406 0.07015425 0.068381056 0.066652656 0.06496793 0.06332577 0.061725102 0.06016488 0.058644082 0.057161715 0.055716805 0.05430841 0.052935608 0.051597495 0.0502932

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="2.8" PeakHeight="226.503" Num="5" zHalfNm="210.429" Error="0.457">
-38.768 1.68 -0.964 0.446 -0.147
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="20" EarthRadius="6370.0">
<QuasiParabolic ID="0" StartDistance="6460.0205" EndDistance="6480.001" A="-5.5027394E11" B="1.69837632E8" C="-13104.63" Error="0.0016"/>
<QuasiParabolic ID="1" StartDistance="6480.0" EndDistance="6506.25" A="-2.20048884E11" B="6.791632E7" C="-5240.3315" Error="0.00141"/>
<QuasiParabolic ID="2" StartDistance="6506.25" EndDistance="6532.5" A="0.0" B="20.435097" C="0.036871783" Error="3.16E-4"/>
<QuasiParabolic ID="3" StartDistance="6532.5" EndDistance="6533.0" A="-3.17870823E13" B="9.7312307E9" C="-744774.6" Error="5.82E-9"/>
<QuasiParabolic ID="4" StartDistance="6533.0" EndDistance="6545.0" A="3.66284341E11" B="-1.12138712E8" C="8582.919" Error="0.0787"/>
<QuasiParabolic ID="5" StartDistance="6545.0" EndDistance="6546.0" A="-3.07784004E12" B="9.4030573E8" C="-71817.73" Error="0.0"/>
<QuasiParabolic ID="6" StartDistance="6546.0" EndDistance="6547.0" A="3.20698869E12" B="-9.7989862E8" C="74852.33" Error="0.0"/>
<QuasiParabolic ID="7" StartDistance="6547.0" EndDistance="6548.0" A="-3.07957518E12" B="9.4054246E8" C="-71813.41" Error="1.79E-10"/>
<QuasiParabolic ID="8" StartDistance="6548.0" EndDistance="6549.0" A="3.20899881E12" B="-9.8021926E8" C="74854.414" Error="0.0"/>
<QuasiParabolic ID="9" StartDistance="6549.0" EndDistance="6550.0" A="-3.08140651E12" B="9.4080851E8" C="-71811.32" Error="0.0"/>
<QuasiParabolic ID="10" StartDistance="6550.0" EndDistance="6551.0" A="3.21109151E12" B="-9.8056499E8" C="74858.414" Error="1.59E-10"/>
<QuasiParabolic ID="11" StartDistance="6551.0" EndDistance="6552.0" A="-3.08322474E12" B="9.4107027E8" C="-71808.91" Error="0.0"/>
<QuasiParabolic ID="12" StartDistance="6552.0" EndDistance="6553.0" A="3.21306178E12" B="-9.8087315E8" C="74859.55" Error="0.0"/>
<QuasiParabolic ID="13" StartDistance="6553.0" EndDistance="6554.0" A="-3.08493366E12" B="9.412985E8" C="-71803.945" Error="1.42E-10"/>
<QuasiParabolic ID="14" StartDistance="6554.0" EndDistance="6555.0" A="3.21506037E12" B="-9.811897E8" C="74861.31" Error="0.0"/>
<QuasiParabolic ID="15" StartDistance="6555.0" EndDistance="6556.0" A="-3.52449882E12" B="1.07512128E9" C="-81989.25" Error="0.0"/>
<QuasiParabolic ID="16" StartDistance="6556.0" EndDistance="6559.0" A="3.94581875E12" B="-1.20380416E9" C="91815.31" Error="0.0311"/>
<QuasiParabolic ID="17" StartDistance="6559.0" EndDistance="6567.0" A="1.10707721E13" B="-3.37637709E9" C="257433.02" Error="0.0489"/>
<QuasiParabolic ID="18" StartDistance="6567.0" EndDistance="6584.0" A="1.73925623E13" B="-5.301698E9" C="404023.6" Error="0.0332"/>
<QuasiParabolic ID="19" StartDistance="6584.0" EndDistance="6596.503" A="-3.19864292E13" B="9.6979958E9" C="-735078.3" Error="0.0114"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="78.75" Depth="0.154"/>
<TopsideChapman PeakHeight="226.503" PeakDensity="97270.47" PeakScaleHeight="12.204" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
