<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 01:30:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.22 (081) 01:30:00</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">
FF202608103220130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.005" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.184" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.600" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="357.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="334.112" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="286.071" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.752" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="68.408" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.311" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.579" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="59.750" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.380" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="72">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 277.500 280.000 282.500 285.000 290.000 295.000 292.500 290.000 295.000 296.250 297.500 298.750 300.000 300.000 300.000 300.000 300.000 300.000 302.500 305.000 307.500 310.000 310.000 307.500 305.000 307.500 310.000 310.000 310.000 312.500 315.000 315.000 315.000 320.000 320.833 321.667 322.500 323.333 324.167 325.000 325.000 325.000 330.000 330.000 335.000 335.000 335.000 337.500 340.000 345.000 345.000 345.000 345.000 345.000 348.000 351.000 354.000 357.000 360.000 365.000 370.000 375.000 378.671 383.016 388.238 394.634 402.649 412.987 426.830 446.322 475.810
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 60 0 0 0 57 60 0 60 57 0 0 0 57 63 66 0 66 63 63 63 51 51 51 0 69 0 60 0 60 63 63 60 0 60 0 69 0 0 0 63 69 69 72 72 66 69 60 0 69 69 66 0 72 66 0 0 0 0 66 69 57 51 0 54 54 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 0.390625 -1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875 1.953125 1.171875 1.953125 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="148">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.251 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.502 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.753 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 334.112 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.317 0.295 0.265 0.223 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.223 0.243 0.264 0.285 0.305 0.326 0.347 0.354 0.444 0.585 0.739 0.916 1.124 1.374 1.682 2.065 2.54 3.106 3.723 4.329 4.877 5.351 5.753 6.088 6.364 6.588 6.763 6.895 6.986 7.037 7.05 7.05 7.033 6.993 6.932 6.853 6.757 6.647 6.525 6.392 6.251 6.103 5.949 5.79 5.629 5.466 5.301 5.137 4.973 4.81 4.649 4.49 4.334 4.181 4.031 3.884 3.741 3.602 3.466 3.335 3.207 3.083 2.964 2.848 2.736 2.628 2.523 2.423 2.326 2.232 2.142 2.056 1.972 1.892 1.815 1.741 1.67 1.601 1.536 1.472 1.412 1.354 1.298 1.244 1.193 1.143 1.096 1.05 1.007 0.965 0.925 0.887 0.85 0.814 0.78 0.748 0.717 0.687 0.658 0.631 0.605 0.579 0.555 0.532 0.51 0.489 0.468 0.449 0.43 0.412 0.395 0.378 0.362 0.347 0.333 0.319 0.306 0.293 0.281 0.269 0.258 0.247 0.236 0.227 0.217 0.208

</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="7.05" PeakHeight="334.112" Num="5" zHalfNm="286.071" Error="1.152">
-125.891 21.25 -12.52 5.488 -0.686
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.753" Depth="0.154"/>
<TopsideChapman PeakHeight="334.112" PeakDensity="616656.3" PeakScaleHeight="36.579" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
