<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-20 -110 06:50:00.000"
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: F2 cusps do not match</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.20 (110) 06:50:00</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">
FF202611004200650001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.625" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.596" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.440" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.175" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.175" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="2.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="242.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="242.500" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.425" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="267.500" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.175" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.175" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="249.700" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.634" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.064" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="30.042" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.594" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="16.202" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="27.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.790" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="19">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
242.500 244.500 246.500 248.500 250.500 252.500 255.000 257.500 260.833 264.167 267.500 274.375 281.250 288.125 295.000 297.500 317.500 327.631 338.632
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 0 0 0 54 51 51 0 0 78 0 0 0 63 63 63 0 63
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.5625 7.8125 -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
</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 99.0 100.0 101.0 102.0 103.0 104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 126.0 127.0 128.0 129.0 130.0 131.0 132.0 133.0 134.0 135.0 136.0 137.0 138.0 139.0 140.0 140.91667 141.0 142.0 143.0 144.0 145.0 146.0 147.0 148.0 149.0 150.0 151.0 152.0 153.0 154.0 155.0 156.0 157.0 158.0 159.0 160.0 161.0 162.0 163.0 164.0 165.0 166.0 167.0 168.0 169.0 170.0 171.0 171.83333 172.0 173.0 174.0 175.0 176.0 177.0 178.0 179.0 180.0 181.0 182.0 183.0 184.0 185.0 186.0 187.0 188.0 189.0 190.0 191.0 192.0 193.0 194.0 195.0 196.0 197.0 198.0 199.0 200.0 201.0 202.0 202.75 203.0 204.0 205.0 206.0 207.0 208.0 209.0 210.0 211.0 212.0 213.0 214.0 215.0 216.0 217.0 218.0 219.0 220.0 221.0 222.0 223.0 224.0 225.0 226.0 227.0 228.0 229.0 230.0 231.0 232.0 233.0 234.0 235.0 236.0 237.0 238.0 239.0 240.0 241.0 242.0 243.0 244.0 245.0 246.0 247.0 248.0 249.0 249.7 250.0 251.0 252.0 253.0 254.0 255.0 256.0 257.0 258.0 259.0 260.0 261.0 262.0 263.0 264.0 265.0 266.0 267.0 268.0 269.0 270.0 271.0 272.0 273.0 274.0 275.0 276.0 277.0 278.0 279.0 280.0 281.0 282.0 283.0 284.0 285.0 286.0 287.0 288.0 289.0 290.0 291.0 292.0 293.0 294.0 295.0 296.0 297.0 298.0 299.0 300.0 301.0 302.0 303.0 304.0 305.0 306.0 307.0 308.0 309.0 310.0 311.0 312.0 313.0 314.0 315.0 316.0 317.0 318.0 319.0 320.0 321.0 322.0 323.0 324.0 325.0 326.0 327.0 328.0 329.0 330.0 331.0 332.0 333.0 334.0 335.0 336.0 337.0 338.0 339.0 340.0 341.0 342.0 343.0 344.0 345.0 346.0 347.0 348.0 349.0 350.0 351.0 352.0 353.0 354.0 355.0 356.0 357.0 358.0 359.0 360.0 361.0 362.0 363.0 364.0 365.0 366.0 367.0 368.0 369.0 370.0 371.0 372.0 373.0 374.0 375.0 376.0 377.0 378.0 379.0 380.0 381.0 382.0 383.0 384.0 385.0 386.0 387.0 388.0 389.0 390.0 391.0 392.0 393.0 394.0 395.0 396.0 397.0 398.0 399.0 400.0 401.0 402.0 403.0 404.0 405.0 406.0 407.0 408.0 409.0 410.0 411.0 412.0 413.0 414.0 415.0 416.0 417.0 418.0 419.0 420.0 421.0 422.0 423.0 424.0 425.0 426.0 427.0 428.0 429.0 430.0 431.0 432.0 433.0 434.0 435.0 436.0 437.0 438.0 439.0 440.0 441.0 442.0 443.0 444.0 445.0 446.0 447.0 448.0 449.0 450.0 451.0 452.0 453.0 454.0 455.0 456.0 457.0 458.0 459.0 460.0 461.0 462.0 463.0 464.0 465.0 466.0 467.0 468.0 469.0 470.0 471.0 472.0 473.0 474.0 475.0 476.0 477.0 478.0 479.0 480.0
</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 0.3538872 0.35347393 0.3529119 0.3519786 0.3509026 0.34953943 0.34789655 0.34598285 0.3438088 0.34138623 0.3386593 0.33571413 0.33243394 0.32884502 0.3249759 0.3207348 0.3162249 0.311316 0.3060709 0.30039963 0.29436976 0.2878726 0.28096467 0.27349284 0.26549044 0.25688842 0.24761072 0.23761433 0.22685163 0.21513027 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 0.20083019 0.20581132 0.21079245 0.21577358 0.22075471 0.22573584 0.23071699 0.23569812 0.24067925 0.24566038 0.2506415 0.25562266 0.2606038 0.26558492 0.27056605 0.27554718 0.2805283 0.28550944 0.29049057 0.2954717 0.30045283 0.30543396 0.3104151 0.31539622 0.32037735 0.32535848 0.3303396 0.33532074 0.3403019 0.34528303 0.35026416 0.354 0.36139834 0.3926396 0.42627695 0.4620243 0.49967408 0.5390845 0.5802149 0.62309283 0.6677826 0.714409 0.7631169 0.81407034 0.8674703 0.9235061 0.98236364 1.0442232 1.1092407 1.1775048 1.2490005 1.3235996 1.4009954 1.4807081 1.5620216 1.644045 1.7258012 1.8062456 1.8844155 1.9595182 2.0308938 2.0981314 2.1609833 2.2193253 2.273179 2.3226163 2.3677506 2.408731 2.4457173 2.4788568 2.5083013 2.5341923 2.556645 2.5757737 2.5916739 2.6044173 2.614068 2.6206737 2.6242673 2.625 2.6249125 2.6233773 2.6199882 2.6148224 2.6079576 2.5994716 2.589442 2.5779462 2.5650609 2.5508614 2.5354223 2.5188165 2.5011158 2.4823897 2.4627066 2.4421325 2.4207315 2.3985665 2.3756971 2.3521817 2.328076 2.3034337 2.278307 2.2527447 2.226795 2.2005026 2.1739109 2.1470613 2.119993 2.0927432 2.065347 2.0378385 2.010249 1.9826086 1.9549454 1.9272865 1.8996567 1.8720794 1.8445768 1.8171698 1.7898774 1.7627177 1.7357076 1.7088628 1.6821975 1.6557251 1.6294581 1.6034079 1.5775846 1.5519981 1.526657 1.5015692 1.4767417 1.452181 1.4278928 1.4038821 1.3801537 1.3567111 1.3335581 1.3106971 1.2881308 1.2658609 1.2438891 1.2222165 1.2008437 1.1797711 1.1589988 1.1385267 1.1183541 1.0984803 1.0789043 1.0596247 1.0406401 1.0219489 1.0035493 0.9854393 0.96761656 0.95007896 0.932824 0.9158492 0.8991519 0.88272935 0.86657876 0.85069716 0.83508164 0.8197291 0.8046366 0.7898008 0.7752188 0.76088715 0.74680275 0.7329623 0.71936256 0.7060002 0.692872 0.67997456 0.66730464 0.65485895 0.6426341 0.630627 0.61883414 0.6072524 0.59587854 0.5847093 0.57374144 0.56297183 0.5523973 0.5420148 0.531821 0.52181304 0.5119878 0.5023422 0.49287337 0.48357826 0.474454 0.46549767 0.45670643 0.44807747 0.439608 0.43129528 0.42313656 0.4151292 0.40727058 0.39955807 0.3919891 0.38456115 0.3772717 0.37011832 0.3630986 0.35621014 0.34945056 0.3428176 0.33630896 0.3299224 0.3236557 0.31750673 0.3114733 0.30555335 0.29974478 0.2940456 0.2884538 0.28296736 0.2775844 0.27230301 0.26712132 0.2620375 0.25704968 0.25215617 0.24735521 0.24264504 0.23802401 0.23349045 0.22904275 0.2246793 0.22039855 0.21619892 0.21207893 0.20803708 0.20407191 0.20018198 0.19636588 0.19262223 0.18894969 0.18534689 0.18181254 0.17834535 0.17494407 0.17160743 0.16833425 0.16512331 0.16197343 0.15888348 0.15585233 0.15287885 0.14996196 0.1471006 0.1442937 0.14154024 0.13883923 0.13618965 0.13359053 0.13104093 0.12853989 0.12608652 0.12367988 0.12131911 0.119003326 0.11673169 0.11450335 0.11231749 0.1101733 0.10806999 0.10600679 0.10398293 0.10199767 0.10005027 0.09814001 0.09626619 0.09442811 0.09262509 0.09085646 0.08912158 0.0874198 0.08575049 0.08411303 0.08250681 0.080931254 0.07938575 0.07786975 0.076382674 0.074923985 0.07349314 0.0720896 0.07071284 0.06936237 0.06803768 0.06673827 0.06546367 0.0642134 0.062987 0.061784014 0.06060399 0.0594465 0.058311105 0.05719739 0.056104936 0.055033345 0.05398221 0.05295115 0.051939774 0.05094771

</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="2.625" PeakHeight="249.7" Num="5" zHalfNm="228.634" Error="2.359">
-49.572 4.723 -3.225 1.456 -0.332
</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="6510.917" A="-1.58830494E11" B="4.902176E7" C="-3782.4177" Error="0.00166"/>
<QuasiParabolic ID="2" StartDistance="6510.917" EndDistance="6541.833" A="0.0" B="1651.1959" C="-0.21357743" Error="0.0293"/>
<QuasiParabolic ID="3" StartDistance="6541.833" EndDistance="6571.0" A="2.27237007E10" B="-7049609.5" C="546.6763" Error="0.0293"/>
<QuasiParabolic ID="4" StartDistance="6571.0" EndDistance="6573.0" A="5.0211775E12" B="-1.52841741E9" C="116310.47" Error="0.0153"/>
<QuasiParabolic ID="5" StartDistance="6573.0" EndDistance="6587.0" A="6.1079075E12" B="-1.85908224E9" C="141463.73" Error="0.0391"/>
<QuasiParabolic ID="6" StartDistance="6587.0" EndDistance="6590.0" A="2.14143966E13" B="-6.5065661E9" C="494240.72" Error="0.00614"/>
<QuasiParabolic ID="7" StartDistance="6590.0" EndDistance="6600.0" A="1.33339923E13" B="-4.05424333E9" C="308176.78" Error="0.0139"/>
<QuasiParabolic ID="8" StartDistance="6600.0" EndDistance="6619.7" A="-1.51247882E13" B="4.5696292E9" C="-345146.94" Error="0.0063"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="92.75" Depth="0.154"/>
<TopsideChapman PeakHeight="249.7" PeakDensity="85491.625" PeakScaleHeight="16.202" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
