<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-04 -094 02:20:00.000"
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: 70% PACIFIC flags: One of F2 cusps was derived from the other, Unidentified traces above foF2</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.04 (094) 02:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.19" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.97" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="78.74007" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202609404040220001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="4.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.479" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="14.786" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="277.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="277.500" 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="4.225" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="323.044" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="277.226" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.746" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.818" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="28.269" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.399" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="14.325" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="29.400" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="45">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.15 3.175 3.2 3.225 3.25 3.275 3.3 3.325 3.35 3.375 3.4 3.425 3.45 3.475 3.5 3.525 3.55 3.575 3.6 3.625 3.65 3.675 3.7 3.725 3.75 3.775 3.8 3.825 3.85 3.875 3.9 3.925 3.95 3.975 4.0 4.025 4.05 4.075 4.1 4.125 4.15 4.175 4.2 4.225 4.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
277.500 278.125 278.750 279.375 280.000 282.500 283.000 283.500 284.000 284.500 285.000 285.833 286.667 287.500 287.500 290.000 290.000 290.000 292.500 292.500 295.000 295.000 297.500 297.500 298.500 299.500 300.500 301.500 302.500 305.000 306.250 307.500 307.500 308.750 310.000 311.250 312.500 313.255 314.146 315.215 316.522 318.154 320.251 323.044 326.948
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
90 0 0 0 90 90 0 0 0 0 87 0 0 78 75 81 78 78 78 78 78 81 75 63 0 0 0 0 84 84 0 96 96 0 84 0 84 0 0 0 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 -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 4.6875 -1.5625 -1.5625 -1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="415">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 94.0 95.0 96.0 97.0 98.0 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 141.0 142.0 143.0 144.0 145.0 146.0 147.0 147.00967 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 184.01933 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 221.029 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 277.226 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0 481.0 482.0 483.0 484.0 485.0 486.0 487.0 488.0 489.0 490.0 491.0 492.0 493.0 494.0 495.0 496.0 497.0 498.0 499.0 500.0 501.0 502.0 503.0
</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 0.35265058 0.35186794 0.35086685 0.34972504 0.34844565 0.34695974 0.34527344 0.34339368 0.3413282 0.33908543 0.33660662 0.3339719 0.33112627 0.32808504 0.3248016 0.32129765 0.31759593 0.31360525 0.3093617 0.30490285 0.3001136 0.29507858 0.2897397 0.28408715 0.27805158 0.27168703 0.26493138 0.2577978 0.25014976 0.24206898 0.23340046 0.22410443 0.21426493 0.20364982 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 0.20408063 0.2082417 0.21240278 0.21656385 0.22072493 0.224886 0.22904707 0.23320815 0.23736922 0.2415303 0.24569137 0.24985245 0.25401354 0.2581746 0.2623357 0.26649675 0.27065784 0.2748189 0.27898 0.28314105 0.28730214 0.2914632 0.2956243 0.29978535 0.30394644 0.3081075 0.31226858 0.31642964 0.32059073 0.3247518 0.32891288 0.33307394 0.33723503 0.3413961 0.34555718 0.34971824 0.35387933 0.354 0.3959036 0.43484238 0.47295117 0.511587 0.5515675 0.5934483 0.6377073 0.6847516 0.73493683 0.788559 0.8458857 0.90706116 0.97213614 1.041071 1.113673 1.1896691 1.2686571 1.3502464 1.4339833 1.5194272 1.6062263 1.6940079 1.7825214 1.8715277 1.9608257 2.050299 2.1398497 2.2293773 2.3188217 2.408167 2.4973414 2.5863435 2.675129 2.7636697 2.8519387 2.9398723 3.0274127 3.1145139 3.201058 3.286928 3.371999 3.4560666 3.5389054 3.6202185 3.699662 3.7767847 3.8510423 3.9218047 3.9882991 4.0496273 4.104771 4.152637 4.192066 4.2219734 4.2414093 4.2497067 4.25 4.248802 4.2438006 4.235072 4.2227983 4.207162 4.1883445 4.1665273 4.1418886 4.114605 4.084848 4.052787 4.018586 3.982405 3.9443986 3.9047165 3.8635025 3.8208957 3.7770288 3.7320292 3.6860185 3.639113 3.5914228 3.5430532 3.4941032 3.444667 3.3948338 3.344687 3.2943058 3.2437642 3.1931317 3.1424735 3.09185 3.0413184 2.990931 2.940737 2.8907819 2.8411071 2.791752 2.7427518 2.6941392 2.6459439 2.5981934 2.550912 2.5041223 2.4578443 2.4120958 2.366893 2.3222504 2.2781796 2.234692 2.191797 2.1495018 2.1078131 2.0667362 2.0262752 1.986433 1.9472116 1.9086119 1.8706342 1.833278 1.7965416 1.7604232 1.72492 1.6900289 1.6557459 1.622067 1.5889872 1.5565016 1.5246048 1.4932909 1.4625539 1.4323872 1.4027846 1.373739 1.3452437 1.3172914 1.2898749 1.2629868 1.2366196 1.2107658 1.1854179 1.160568 1.1362085 1.1123317 1.0889299 1.0659953 1.0435202 1.0214969 0.9999176 0.97877496 0.95806116 0.9377687 0.91789013 0.89841795 0.87934494 0.86066365 0.842367 0.8244478 0.806899 0.7897137 0.77288485 0.7564058 0.7402698 0.7244702 0.7090005 0.69385433 0.67902535 0.66450727 0.65029395 0.6363794 0.6227577 0.60942286 0.5963693 0.5835913 0.57108325 0.55883974 0.54685533 0.5351249 0.5236431 0.5124049 0.5014054 0.4906396 0.4801027 0.46978995 0.45969677 0.44981855 0.44015092 0.4306894 0.42142975 0.4123678 0.4034993 0.39482033 0.38632685 0.37801498 0.36988094 0.36192095 0.35413134 0.34650856 0.33904907 0.3317494 0.32460624 0.31761622 0.3107761 0.30408272 0.29753298 0.2911238 0.2848522 0.2787153 0.27271017 0.26683408 0.2610842 0.2554579 0.24995254 0.24456553 0.23929434 0.23413648 0.22908957 0.22415121 0.2193191 0.21459095 0.20996454 0.2054377 0.2010083 0.19667424 0.19243349 0.18828405 0.18422395 0.18025129 0.17636417 0.17256078 0.16883932 0.16519803 0.16163518 0.15814908 0.1547381 0.15140061 0.14813505 0.14493985 0.14181353 0.13875458 0.13576156 0.13283305 0.12996767 0.12716407 0.124420896 0.12173686 0.119110696 0.116541155 0.11402701 0.11156708 0.109160185 0.1068052 0.10450099 0.10224647 0.10004057 0.09788224 0.09577046 0.09370422 0.09168255 0.089704484 0.087769076 0.085875414 0.0840226 0.08220974 0.08043599 0.078700505 0.07700245 0.07534102 0.07371544 0.07212492 0.07056871 0.06904607 0.067556284 0.06609864 0.06467243 0.06327699 0.06191166 0.060575783 0.059268724 0.057989866 0.0567386 0.05551433 0.05431647 0.05314445 0.051997725 0.05087574

</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="4.25" PeakHeight="277.226" Num="5" zHalfNm="257.746" Error="1.157">
-53.701 -4.79 3.339 -1.864 0.819
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="10" 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="6517.01" A="-1.11035703E11" B="3.427028E7" C="-2644.1863" Error="0.00178"/>
<QuasiParabolic ID="2" StartDistance="6517.01" EndDistance="6554.019" A="0.0" B="40.00369" C="0.033896316" Error="8.67E-4"/>
<QuasiParabolic ID="3" StartDistance="6554.019" EndDistance="6555.0" A="7.9271093E12" B="-2.41875354E9" C="184505.14" Error="0.0838"/>
<QuasiParabolic ID="4" StartDistance="6555.0" EndDistance="6589.0" A="-7.623636E9" B="2217613.5" C="-160.84456" Error="0.0794"/>
<QuasiParabolic ID="5" StartDistance="6589.0" EndDistance="6591.0" A="5.4606572E12" B="-1.65760346E9" C="125793.1" Error="0.0147"/>
<QuasiParabolic ID="6" StartDistance="6591.0" EndDistance="6600.0" A="6.4900039E12" B="-1.96995264E9" C="149488.23" Error="0.078"/>
<QuasiParabolic ID="7" StartDistance="6600.0" EndDistance="6607.0" A="1.49020308E13" B="-4.5190518E9" C="342601.78" Error="0.0248"/>
<QuasiParabolic ID="8" StartDistance="6607.0" EndDistance="6639.0" A="1.4929019E13" B="-4.5272212E9" C="343220.06" Error="0.0456"/>
<QuasiParabolic ID="9" StartDistance="6639.0" EndDistance="6647.226" A="-8.0074036E13" B="2.40924672E10" C="-1812201.6" Error="0.00652"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="111.029" Depth="0.154"/>
<TopsideChapman PeakHeight="277.226" PeakDensity="224100.5" PeakScaleHeight="14.325" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
