<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-18 -108 05:35:00.000"
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: 90% PACIFIC flags: 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) 05:35:00</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">
FF202610804180535001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.825" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.721" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="10.511" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.125" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="268.544" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="237.923" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="216.409" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.369" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="30.736" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.701" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="16.692" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="27.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="34">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 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 2.825
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 225.000 225.000 227.500 227.500 230.000 230.000 230.000 231.250 232.500 232.500 235.000 235.000 237.500 237.500 240.000 241.250 242.500 243.750 245.000 247.500 250.000 250.000 252.186 254.644 257.428 260.607 264.272 268.544 273.587 279.630 287.003 296.202 307.997
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 72 72 75 72 75 75 87 0 66 63 48 51 63 60 60 0 78 0 78 78 63 63 63 66 78 81 66 66 63 66 60 57 39
</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 1.5625 -1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="392">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 136.83333 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 163.66667 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 190.5 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 237.923 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0
</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 0.35253775 0.3513833 0.34986797 0.34800196 0.34587008 0.3433416 0.34043694 0.33717975 0.3335292 0.3294542 0.3250611 0.3201454 0.31483623 0.30908883 0.30277678 0.29597685 0.28861925 0.2806141 0.2719544 0.2625736 0.25233817 0.24117032 0.22898808 0.2156547 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 0.20191304 0.20765217 0.2133913 0.21913044 0.22486956 0.2306087 0.23634782 0.24208696 0.24782608 0.25356522 0.25930434 0.26504347 0.27078262 0.27652174 0.28226086 0.288 0.29373914 0.29947826 0.3052174 0.3109565 0.31669566 0.32243478 0.3281739 0.33391306 0.33965218 0.3453913 0.35113043 0.354 0.36787996 0.39925197 0.43536833 0.47562337 0.5190809 0.56486607 0.6123976 0.6613689 0.7117323 0.76355153 0.81702536 0.8723675 0.9298566 0.9897883 1.0524873 1.1182911 1.1874986 1.2604461 1.3373536 1.4183234 1.5032679 1.5917853 1.6831248 1.7761147 1.8692302 1.9608607 2.0494292 2.1336656 2.212677 2.2860034 2.353493 2.4152086 2.4713724 2.5222666 2.56822 2.6095486 2.6465333 2.679462 2.7085714 2.7340758 2.756152 2.774965 2.7906406 2.8032863 2.8129902 2.819816 2.8238075 2.825 2.824994 2.823867 2.8208401 2.8159895 2.8093915 2.8011227 2.7912595 2.7798784 2.7670548 2.752864 2.7373793 2.7206736 2.702818 2.683882 2.663934 2.6430402 2.621265 2.5986712 2.5753193 2.5512683 2.5265744 2.5012927 2.4754753 2.4491732 2.4224348 2.3953063 2.3678324 2.3400557 2.3120167 2.283754 2.2553046 2.2267032 2.197983 2.1691759 2.1403112 2.1114175 2.082521 2.0536473 2.0248194 1.99606 1.9673897 1.9388281 1.9103935 1.8821027 1.853972 1.8260158 1.798248 1.7706815 1.7433277 1.7161977 1.6893014 1.6626477 1.6362451 1.6101012 1.5842229 1.5586162 1.5332866 1.5082392 1.4834782 1.4590075 1.4348303 1.4109493 1.3873671 1.3640856 1.3411059 1.3184296 1.2960571 1.2739891 1.2522256 1.2307665 1.2096112 1.1887592 1.1682093 1.1479605 1.1280116 1.1083608 1.0890063 1.0699464 1.0511789 1.0327017 1.0145125 0.9966088 0.9789881 0.96164775 0.944585 0.9277971 0.9112811 0.8950342 0.87905324 0.86333525 0.84787714 0.8326758 0.8177281 0.8030308 0.7885807 0.7743746 0.76040924 0.7466814 0.73318785 0.7199253 0.7068905 0.6940803 0.6814913 0.66912043 0.6569644 0.64502007 0.63328415 0.6217536 0.6104252 0.59929585 0.5883625 0.577622 0.5670714 0.5567076 0.5465277 0.5365287 0.52670765 0.51706165 0.5075879 0.4982835 0.48914573 0.48017174 0.47135884 0.46270436 0.45420557 0.4458599 0.43766475 0.42961755 0.42171577 0.4139569 0.40633854 0.39885822 0.3915136 0.3843023 0.377222 0.37027043 0.36344537 0.35674456 0.35016584 0.34370708 0.33736616 0.331141 0.32502955 0.31902978 0.31313974 0.30735746 0.301681 0.29610854 0.29063818 0.2852681 0.27999648 0.2748216 0.2697417 0.26475507 0.25986004 0.25505495 0.25033817 0.24570814 0.24116327 0.23670201 0.23232286 0.22802433 0.22380495 0.2196633 0.21559796 0.21160753 0.20769066 0.203846 0.20007224 0.1963681 0.19273229 0.18916357 0.18566072 0.18222253 0.17884782 0.17553541 0.1722842 0.16909303 0.16596082 0.16288649 0.15986897 0.15690722 0.15400021 0.15114695 0.14834645 0.14559773 0.14289984 0.14025185 0.13765284 0.13510191 0.13259818 0.13014077 0.12772882 0.12536152 0.12303804 0.12075755 0.11851928 0.11632244 0.114166275 0.11205003 0.10997296 0.107934356 0.1059335 0.1039697 0.10204227 0.10015054 0.09829384 0.09647154 0.09468299 0.092927575 0.09120468 0.089513704 0.08785405 0.08622515 0.084626436 0.083057344 0.081517324 0.08000584 0.07852237 0.077066384 0.075637385 0.07423487 0.07285835 0.071507335 0.07018137 0.06887998 0.0676027 0.066349104 0.065118745 0.06391119 0.06272603 0.061562825 0.06042119 0.05930072 0.05820102 0.05712171 0.056062404 0.05502274 0.05400235 0.05300088 0.052017976 0.051053293 0.0501065

</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="237.923" Num="5" zHalfNm="216.409" Error="1.187">
-51.22 6.52 -4.176 2.148 -0.695
</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="6506.833" A="-2.10612257E11" B="6.5003784E7" C="-5015.5986" Error="0.00148"/>
<QuasiParabolic ID="2" StartDistance="6506.833" EndDistance="6533.667" A="0.0" B="102.94385" C="0.024198316" Error="0.00114"/>
<QuasiParabolic ID="3" StartDistance="6533.667" EndDistance="6560.0" A="6.1163848E10" B="-1.8821148E7" C="1447.8964" Error="0.0021"/>
<QuasiParabolic ID="4" StartDistance="6560.0" EndDistance="6562.0" A="1.21267762E13" B="-3.69736141E9" C="281824.44" Error="0.00895"/>
<QuasiParabolic ID="5" StartDistance="6562.0" EndDistance="6568.0" A="5.0692578E12" B="-1.54633485E9" C="117924.22" Error="0.013"/>
<QuasiParabolic ID="6" StartDistance="6568.0" EndDistance="6576.0" A="9.1909427E12" B="-2.80141568E9" C="213469.34" Error="0.012"/>
<QuasiParabolic ID="7" StartDistance="6576.0" EndDistance="6586.0" A="2.22429289E13" B="-6.7709978E9" C="515292.8" Error="0.0033"/>
<QuasiParabolic ID="8" StartDistance="6586.0" EndDistance="6607.923" A="-1.62663267E13" B="4.9232799E9" C="-372520.56" Error="0.0069"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="80.5" Depth="0.154"/>
<TopsideChapman PeakHeight="237.923" PeakDensity="99015.195" PeakScaleHeight="16.692" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
