<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-15 -105 01:25:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, F2 cusps do not match</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.15 (105) 01:25:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.19" 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">
FF202610504150125001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.825" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.554" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="10.041" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="291.108" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="264.301" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="246.098" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.097" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="25.987" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.595" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="13.734" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="26.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.120" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 2.825
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 277.500 277.500 277.500 280.000 282.500 285.000 287.500 291.108 295.723 301.835 310.315 322.867 343.352
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 72 78 78 75 72 72 69 69 0 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="375">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 146.68933 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 183.37866 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 220.068 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 264.301 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0
</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 0.35362422 0.35321164 0.35257575 0.35179353 0.3507929 0.34965166 0.34829983 0.34681538 0.34505904 0.34318206 0.34111962 0.33881128 0.33633736 0.33364123 0.33073738 0.3276094 0.32427585 0.32072598 0.31686488 0.31284192 0.30851668 0.30393335 0.29908684 0.29390994 0.28845325 0.28270897 0.27653006 0.27006534 0.26312038 0.2557543 0.24794106 0.23956074 0.23071367 0.22120562 0.21097557 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 0.2 0.2 0.2 0.2 0.2 0.2 0.20260799 0.2068054 0.2110028 0.2152002 0.2193976 0.22359501 0.22779241 0.23198983 0.23618723 0.24038464 0.24458204 0.24877945 0.25297686 0.25717425 0.26137167 0.26556906 0.26976648 0.27396387 0.2781613 0.28235868 0.2865561 0.29075348 0.2949509 0.29914832 0.3033457 0.30754313 0.31174052 0.31593794 0.32013533 0.32433274 0.32853013 0.33272755 0.33692497 0.34112236 0.34531978 0.34951717 0.3537146 0.354 0.38647768 0.423561 0.46300724 0.50485104 0.5491663 0.5959776 0.64533776 0.69728833 0.751848 0.809026 0.86881834 0.9312027 0.9961199 1.0635002 1.133236 1.2051804 1.2791568 1.3549559 1.4323207 1.5109586 1.5905598 1.6707826 1.751234 1.8315175 1.9112403 1.9899479 2.0672402 2.142674 2.215856 2.2863665 2.3538353 2.417893 2.4781985 2.5344396 2.5863392 2.6336374 2.6761053 2.713547 2.7457843 2.7726715 2.7940896 2.8099523 2.8201838 2.8247418 2.825 2.824293 2.8208878 2.8147871 2.8061285 2.795049 2.781686 2.7661757 2.7486525 2.7292485 2.7080932 2.6853123 2.661029 2.6353624 2.608427 2.5803342 2.55119 2.5210962 2.4901514 2.4584482 2.4260755 2.3931177 2.3596547 2.325762 2.2915113 2.25697 2.222201 2.1872644 2.1522157 2.1171067 2.0819864 2.0468998 2.0118892 1.9769933 1.9422486 1.9076881 1.8733425 1.8392401 1.8054065 1.771865 1.7386373 1.7057427 1.6731985 1.6410203 1.6092223 1.5778166 1.5468144 1.5162251 1.4860569 1.4563168 1.4270109 1.3981438 1.3697194 1.3417407 1.3142098 1.2871281 1.2604961 1.2343138 1.2085805 1.183295 1.1584556 1.1340599 1.1101054 1.086589 1.0635072 1.0408564 1.0186324 0.996831 0.9754477 0.9544777 0.9339161 0.9137577 0.8939974 0.8746297 0.8556491 0.8370502 0.8188272 0.80097455 0.7834863 0.7663568 0.7495802 0.73315066 0.71706235 0.70130944 0.68588614 0.6707866 0.6560051 0.6415359 0.6273732 0.61351144 0.599945 0.5866683 0.5736758 0.56096214 0.5485219 0.53634965 0.5244402 0.5127884 0.50138915 0.49023733 0.47932798 0.4686562 0.45821717 0.44800612 0.43801838 0.42824933 0.4186945 0.40934935 0.4002096 0.39127088 0.382529 0.37397978 0.36561918 0.3574432 0.34944794 0.34162948 0.33398408 0.32650802 0.31919768 0.3120495 0.30505997 0.29822567 0.29154322 0.28500935 0.27862084 0.2723745 0.26626727 0.26029608 0.25445798 0.24875005 0.24316943 0.23771334 0.23237903 0.22716385 0.22206517 0.2170804 0.21220705 0.20744267 0.20278484 0.19823119 0.19377944 0.18942732 0.18517262 0.1810132 0.17694692 0.17297174 0.16908562 0.16528659 0.1615727 0.15794204 0.15439281 0.15092315 0.1475313 0.14421554 0.14097415 0.13780549 0.13470793 0.13167988 0.12871979 0.12582614 0.12299745 0.12023226 0.11752916 0.11488675 0.11230369 0.10977863 0.10731029 0.10489738 0.10253868 0.100232966 0.097979054 0.095775776 0.09362201 0.09151663 0.08945856 0.08744675 0.08548014 0.08355773 0.08167853 0.07984158 0.0780459 0.07629059 0.07457474 0.07289746 0.07125789 0.06965517 0.06808849 0.06655703 0.065060005 0.063596636 0.06216617 0.06076787 0.05940101 0.058064885 0.056758806 0.055482093 0.054234095 0.05301416 0.051821657 0.050655972

</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="2.825" PeakHeight="264.301" Num="5" zHalfNm="246.098" Error="0.555">
-44.472 0.421 -0.315 0.159 -0.026
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="8" 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="6516.689" A="-1.12968245E11" B="3.4866744E7" C="-2690.2097" Error="0.00175"/>
<QuasiParabolic ID="2" StartDistance="6516.689" EndDistance="6553.379" A="0.0" B="-2377.1223" C="0.4048151" Error="0.0521"/>
<QuasiParabolic ID="3" StartDistance="6553.379" EndDistance="6585.0" A="6.3687598E10" B="-1.948361E7" C="1490.1628" Error="0.0521"/>
<QuasiParabolic ID="4" StartDistance="6585.0" EndDistance="6588.0" A="-7.3718969E11" B="2.23759312E8" C="-16979.307" Error="0.00611"/>
<QuasiParabolic ID="5" StartDistance="6588.0" EndDistance="6595.0" A="6.4381471E12" B="-1.95454566E9" C="148344.39" Error="0.0579"/>
<QuasiParabolic ID="6" StartDistance="6595.0" EndDistance="6622.0" A="1.09632574E13" B="-3.32683085E9" C="252384.2" Error="0.0566"/>
<QuasiParabolic ID="7" StartDistance="6622.0" EndDistance="6634.301" A="-2.79802754E13" B="8.4350336E9" C="-635705.8" Error="0.0101"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="110.068" Depth="0.154"/>
<TopsideChapman PeakHeight="264.301" PeakDensity="99015.195" PeakScaleHeight="13.734" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
