<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-05-18 -138 00:25:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 95% PACIFIC flags: Multiple candidates for F2o cusp</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.05.18 (138) 00:25:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.22" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.99" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="75.82641" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202613805180025001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.580" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.174" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.725" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.725" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.075" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.225" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="283.026" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.725" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.725" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="255.107" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.924" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.789" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="30.285" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.989" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="16.231" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="28.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.700" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="28">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.725 2.75 2.775 2.8 2.825 2.85 2.875 2.9 2.925 2.95 2.975 3.0 3.025 3.05 3.075 3.1 3.125 3.15 3.175 3.2 3.225 3.25 3.275 3.3 3.325 3.35 3.375 3.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 246.250 247.500 248.750 250.000 251.250 252.500 253.750 255.000 255.000 257.500 260.000 262.500 265.000 267.500 272.500 274.535 276.903 279.692 283.026 287.080 292.119 298.548 307.035 318.760 336.008 363.887
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 42 0 0 0 0 0 0 0 75 93 93 90 87 96 96 99 102 102 96 96 99 96 99 99 90 96 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.5625 1.5625 1.5625 -10.9375 -10.9375 -10.9375 -10.9375 -10.9375 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="411">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 141.5 142.0 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 204.5 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 255.107 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0
</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 0.3538872 0.35354906 0.3529118 0.35205317 0.35097662 0.34968653 0.34811512 0.3462709 0.3442354 0.34187606 0.33927825 0.33638793 0.33322465 0.32980946 0.32603815 0.32200715 0.31768805 0.31300464 0.30795586 0.3025528 0.29676917 0.29057935 0.28398937 0.27689454 0.26927269 0.26112098 0.25231692 0.24289067 0.23271252 0.2217551 0.20985778 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 0.2 0.2 0.2 0.2 0.2 0.2048889 0.20977777 0.21466666 0.21955556 0.22444445 0.22933333 0.23422222 0.23911111 0.244 0.2488889 0.25377777 0.25866666 0.26355556 0.26844445 0.27333334 0.27822223 0.28311113 0.288 0.29288888 0.29777777 0.30266666 0.30755556 0.31244445 0.31733334 0.32222223 0.32711112 0.332 0.33688888 0.34177777 0.34666666 0.35155556 0.354 0.3703429 0.40523997 0.44277957 0.482635 0.52456856 0.56844413 0.6141994 0.6618721 0.71152824 0.7632888 0.81729156 0.87372524 0.9327613 0.9946249 1.0595251 1.127683 1.1993084 1.2745945 1.3537102 1.4367502 1.5237298 1.614543 1.7089431 1.8064544 1.9064888 2.0082195 2.1106238 2.2126942 2.3133333 2.4115274 2.5063837 2.5972097 2.6834714 2.764772 2.840938 2.9118445 2.977482 3.0379045 3.0932 3.143497 3.188922 3.2296007 3.265669 3.297243 3.3244312 3.347336 3.3660405 3.3806076 3.3910968 3.3975449 3.399977 3.4 3.3990066 3.3955944 3.3898478 3.3818672 3.3717527 3.3596044 3.3455224 3.3296056 3.3119519 3.292658 3.2718184 3.2495265 3.225873 3.2009468 3.1748343 3.147619 3.1193826 3.0902038 3.0601583 3.0293198 2.9977584 2.9655423 2.9327362 2.8994026 2.865601 2.8313882 2.796819 2.7619443 2.726814 2.6914742 2.6559696 2.620342 2.584631 2.548874 2.5131063 2.4773614 2.4416704 2.4060624 2.3705652 2.3352044 2.300004 2.2649865 2.2301726 2.1955817 2.1612315 2.1271386 2.0933187 2.0597854 2.0265515 1.9936289 1.9610281 1.928759 1.8968302 1.8652495 1.834024 1.8031596 1.7726619 1.7425355 1.7127845 1.6834122 1.6544213 1.6258141 1.5975924 1.5697571 1.5423092 1.5152489 1.488576 1.4622903 1.4363906 1.410876 1.385745 1.3609958 1.3366264 1.3126346 1.2890178 1.2657735 1.2428988 1.2203906 1.1982458 1.1764609 1.1550326 1.1339573 1.1132313 1.0928508 1.072812 1.053111 1.0337436 1.0147059 0.9959938 0.9776031 0.95952964 0.94176924 0.9243177 0.9071707 0.89032406 0.87377346 0.85751474 0.84154356 0.82585573 0.810447 0.7953132 0.78045005 0.7658535 0.7515193 0.73744345 0.7236217 0.71005017 0.6967247 0.6836414 0.6707962 0.6581853 0.6458048 0.63365084 0.62171966 0.61000746 0.5985106 0.58722544 0.57614833 0.56527567 0.55460393 0.5441297 0.53384954 0.5237601 0.5138579 0.5041398 0.4946024 0.4852427 0.47605744 0.46704352 0.4581979 0.44951758 0.44099957 0.43264097 0.42443892 0.4163906 0.4084932 0.400744 0.39314032 0.38567948 0.3783589 0.371176 0.3641283 0.3572133 0.35042852 0.34377164 0.33724025 0.33083206 0.32454482 0.31837624 0.3123242 0.30638647 0.30056095 0.29484558 0.28923827 0.28373706 0.27833995 0.273045 0.2678503 0.262754 0.25775424 0.2528492 0.24803713 0.24331631 0.23868498 0.2341415 0.22968422 0.22531149 0.22102176 0.21681345 0.21268502 0.20863499 0.20466186 0.2007642 0.19694057 0.1931896 0.1895099 0.18590014 0.18235898 0.17888513 0.17547733 0.17213431 0.16885488 0.1656378 0.16248192 0.15938607 0.1563491 0.15336992 0.15044741 0.14758052 0.1447682 0.14200938 0.13930307 0.13664828 0.13404402 0.13148934 0.1289833 0.12652497 0.12411344 0.12174784 0.11942728 0.11715091 0.11491789 0.1127274 0.110578634 0.1084708 0.106403105 0.1043748 0.10238514 0.10043338 0.098518796 0.09664069 0.09479837 0.09299116 0.09121837 0.089479364 0.087773494 0.08610013 0.08445865 0.08284845 0.081268944 0.07971953 0.07819965 0.076708734 0.07524623 0.073811606 0.07240432 0.07102385 0.0696697 0.06834136 0.06703834 0.06576016 0.06450634 0.06327642 0.062069938 0.06088646 0.05972554 0.058586754 0.057469677 0.05637389 0.055298995 0.054244593 0.053210292 0.052195705 0.051200464 0.050224196

</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="3.4" PeakHeight="255.107" Num="5" zHalfNm="233.924" Error="1.72">
-52.907 4.126 -3.007 1.556 -0.375
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="9" 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="6511.5" A="-1.53036653E11" B="4.7233536E7" C="-3644.4375" Error="0.00157"/>
<QuasiParabolic ID="2" StartDistance="6511.5" EndDistance="6543.0" A="0.0" B="804.3159" C="-0.083497606" Error="0.0142"/>
<QuasiParabolic ID="3" StartDistance="6543.0" EndDistance="6573.0" A="3.37830031E10" B="-1.0417619E7" C="803.09467" Error="0.0142"/>
<QuasiParabolic ID="4" StartDistance="6573.0" EndDistance="6583.0" A="6.6400682E12" B="-2.02054554E9" C="153711.05" Error="0.0373"/>
<QuasiParabolic ID="5" StartDistance="6583.0" EndDistance="6585.0" A="6.8083552E12" B="-2.07167322E9" C="157594.36" Error="0.00186"/>
<QuasiParabolic ID="6" StartDistance="6585.0" EndDistance="6588.0" A="1.00558753E13" B="-3.05801216E9" C="232487.2" Error="0.00375"/>
<QuasiParabolic ID="7" StartDistance="6588.0" EndDistance="6606.0" A="2.06908602E13" B="-6.2866048E9" C="477523.1" Error="0.02"/>
<QuasiParabolic ID="8" StartDistance="6606.0" EndDistance="6625.107" A="-2.55875948E13" B="7.7244324E9" C="-582955.06" Error="0.00927"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="94.5" Depth="0.154"/>
<TopsideChapman PeakHeight="255.107" PeakDensity="143424.31" PeakScaleHeight="16.231" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
