<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 21:10:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" 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.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.25 (084) 21:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202608403252110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.937" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.192" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="417.290" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.984" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="334.105" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="286.681" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.371" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="69.367" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.295" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="34.786" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="77.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="176">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 270.000 265.000 270.000 275.000 275.000 274.000 273.000 272.000 271.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 276.667 278.333 280.000 280.000 280.000 280.000 281.154 282.308 283.462 284.615 285.769 286.923 288.077 289.231 290.385 291.538 292.692 293.846 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 296.250 297.500 298.750 300.000 305.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 310.000 310.000 310.000 312.500 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 321.667 323.333 325.000 325.000 325.000 325.000 327.500 330.000 330.000 330.000 330.000 331.250 332.500 333.750 335.000 335.000 335.000 335.000 337.500 340.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 352.500 355.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 390.000 392.500 395.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 405.000 407.500 409.493 411.748 414.323 417.290 420.746 424.823 429.704 435.654 443.066 452.556
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 69 66 63 0 0 51 0 0 0 0 69 0 72 69 63 66 72 69 72 75 0 75 0 66 0 0 66 0 0 57 51 0 0 72 0 69 63 0 0 0 0 0 0 0 0 0 0 0 0 60 66 69 69 69 0 0 66 63 0 48 0 0 60 63 0 72 0 60 60 66 0 69 72 0 57 63 66 66 69 0 66 69 60 63 48 0 60 0 69 72 0 57 63 63 69 0 0 0 60 66 66 69 0 57 63 63 69 0 57 0 63 69 0 72 60 57 63 0 51 0 57 63 63 69 69 60 66 69 72 72 72 66 69 69 57 63 0 69 66 57 0 66 69 66 69 66 66 69 60 60 0 66 66 60 0 48 51 57 60 60 60 57 57 51 0 42 48 0 45 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="154">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.287 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.303 130.0 135.0 140.0 144.605 145.0 150.0 155.0 160.0 161.908 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 334.105 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.655 0.853 0.953 0.984 0.967 0.916 0.825 0.766 0.766 0.766 0.766 0.766 0.771 0.834 0.897 0.96 0.984 1.081 1.221 1.357 1.498 1.646 1.805 1.976 2.163 2.368 2.591 2.835 3.1 3.385 3.691 4.014 4.354 4.707 5.073 5.448 5.832 6.224 6.622 7.026 7.435 7.85 8.269 8.692 9.117 9.541 9.959 10.362 10.732 11.041 11.244 11.3 11.299 11.269 11.199 11.092 10.953 10.785 10.594 10.381 10.151 9.908 9.652 9.389 9.119 8.845 8.568 8.291 8.014 7.739 7.468 7.2 6.937 6.679 6.426 6.18 5.94 5.707 5.481 5.262 5.05 4.844 4.646 4.455 4.27 4.092 3.921 3.756 3.598 3.446 3.299 3.159 3.024 2.894 2.77 2.651 2.537 2.427 2.323 2.222 2.126 2.034 1.945 1.861 1.78 1.702 1.628 1.557 1.489 1.424 1.362 1.302 1.245 1.191 1.139 1.089 1.041 0.996 0.952 0.91 0.87 0.832 0.796 0.761 0.728 0.696 0.665 0.636 0.608 0.581 0.556 0.531 0.508 0.486 0.465 0.444 0.425 0.406 0.388 0.371 0.355 0.339 0.324 0.31 0.296 0.283 0.271 0.259 0.248 0.237 0.226 0.217 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.984" PeakHeight="110.0" Num="3" Error="0.0">
-26.434 7.922 -1.201
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.984" EndFrequency="11.3" PeakHeight="334.105" Num="5" zHalfNm="286.681" Error="2.935">
-145.901 -35.946 12.172 -5.078 2.556
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="51.908" Depth="0.218"/>
<TopsideChapman PeakHeight="334.105" PeakDensity="1584243.1" PeakScaleHeight="34.786" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
