<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 05:10:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.03.30 (089) 05:10:00</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">
FF202608903300510009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.953" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.750" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="376.678" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="345.893" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.422" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.059" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="98.460" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.905" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.092" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="76.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="68">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 277.500 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 281.667 283.333 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 292.500 295.000 300.000 303.571 307.143 310.714 314.286 317.857 321.429 325.000 320.000 322.500 325.000 325.000 325.000 325.000 325.000 327.500 330.000 331.667 333.333 335.000 340.833 346.667 352.500 358.333 364.167 370.000 370.000 376.678 384.222 392.811 402.679 414.136 427.596 443.638 463.083 487.141 517.674 557.706
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 0 0 66 60 63 63 0 72 0 66 0 75 0 72 69 0 0 60 0 66 66 0 75 75 75 72 0 69 69 60 0 0 48 0 0 60 54 0 54 0 57 0 66 0 66 0 0 72 0 69 54 60 54 57 60 54 0 0 0 0 51 0 0 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -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 1.953125 0.390625 -2.734375 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.851 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.702 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.553 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 345.893 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</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 0.333 0.317 0.293 0.262 0.22 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.205 0.226 0.247 0.268 0.289 0.31 0.331 0.352 0.354 0.482 0.596 0.712 0.843 0.997 1.19 1.455 1.879 2.786 3.855 4.451 4.851 5.152 5.391 5.587 5.75 5.887 6.002 6.097 6.175 6.237 6.285 6.32 6.341 6.35 6.35 6.346 6.333 6.31 6.278 6.239 6.191 6.137 6.076 6.009 5.937 5.861 5.78 5.696 5.608 5.518 5.425 5.33 5.234 5.136 5.037 4.937 4.837 4.737 4.637 4.537 4.437 4.338 4.24 4.143 4.046 3.951 3.856 3.763 3.672 3.581 3.492 3.405 3.319 3.235 3.152 3.071 2.991 2.914 2.837 2.763 2.69 2.618 2.549 2.48 2.414 2.349 2.285 2.223 2.163 2.104 2.046 1.99 1.936 1.883 1.831 1.78 1.731 1.683 1.636 1.591 1.546 1.503 1.461 1.421 1.381 1.342 1.305 1.268 1.232 1.198 1.164 1.131 1.1 1.069 1.038 1.009 0.981 0.953 0.926 0.9 0.875 0.85 0.826 0.802 0.78 0.758 0.736 0.715 0.695 0.675 0.656 0.638 0.619 0.602 0.585 0.568 0.552 0.536 0.521 0.506 0.492 0.478 0.464 0.451 0.438 0.426 0.414 0.402 0.391 0.379 0.369 0.358 0.348 0.338 0.329 0.319 0.31 0.301 0.293 0.284 0.276 0.268 0.261 0.253 0.246 0.239

</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="6.35" PeakHeight="345.893" Num="5" zHalfNm="275.422" Error="2.07">
-161.372 58.748 -34.888 13.286 -1.114
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.553" Depth="0.154"/>
<TopsideChapman PeakHeight="345.893" PeakDensity="500279.16" PeakScaleHeight="54.092" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
