<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 23:30:00.000"
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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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) 23:30:00</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">
FF202608903302330009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.607" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.985" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="1.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="477.222" 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="3.150" 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="457.358" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="407.283" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.763" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="76.604" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.671" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.847" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="92.390" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.130" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
425.000 422.500 420.000 423.333 426.667 430.000 440.000 442.500 445.000 450.000 455.000 455.000 460.000 480.000 480.000 480.000 480.000 480.000 470.000 468.333 466.667 465.000 460.000 465.000 463.421 461.842 460.263 458.684 457.105 455.526 453.947 452.368 450.789 449.211 447.632 446.053 444.474 442.895 441.316 439.737 438.158 436.579 435.000 445.000 435.000 436.667 438.333 440.000 441.667 443.333 445.000 446.667 448.333 450.000 451.667 453.333 455.000 456.667 458.333 460.000 480.000 482.500 485.000 495.000 495.000 500.000 501.667 503.333 505.000 505.000 510.000 505.000 505.000 505.833 506.667 507.500 508.333 509.167 510.000 510.000 517.500 525.000 525.000 525.000 525.000 525.000 522.500 465.000 467.500 470.000 477.222 484.444 490.778 497.901 505.971 515.191 525.826 538.228 552.877 570.445 591.902
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 57 0 0 60 51 0 60 0 66 60 63 51 0 0 0 48 51 0 0 54 63 60 0 0 60 54 54 0 0 0 0 57 0 0 0 0 54 57 0 0 60 54 57 54 0 0 0 0 51 0 0 0 0 54 0 0 0 57 60 0 57 60 54 51 0 0 60 60 57 54 54 0 51 0 0 57 57 57 0 54 0 51 51 54 0 57 0 57 54 54 51 0 51 60 54 51 54 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 2.734375 -0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -1.171875 -1.171875 0.390625 -0.390625 -1.171875 -1.953125 -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 1.171875 0.390625 0.390625 1.953125 -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 -1.171875 -1.953125 -0.390625 -1.171875 -2.734375 -1.953125 -1.953125 -1.171875 -1.953125 -0.390625 -0.390625 -1.171875 -1.953125 0.390625 -1.953125 -1.953125 0.390625 0.390625 -1.953125 0.390625 -1.953125 -1.171875 -2.734375 -0.390625 -0.390625 -1.171875 0.390625 1.171875 -0.390625 -1.171875 1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="180">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.154 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.308 185.0 190.0 195.0 200.0 205.0 210.0 215.0 215.462 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 457.358 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.313 0.287 0.251 0.202 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.221 0.242 0.264 0.286 0.308 0.33 0.352 0.354 0.397 0.457 0.53 0.613 0.703 0.797 0.893 0.99 1.088 1.187 1.288 1.391 1.496 1.603 1.712 1.824 1.939 2.057 2.179 2.305 2.434 2.568 2.706 2.849 2.997 3.151 3.31 3.476 3.649 3.828 4.015 4.21 4.413 4.626 4.847 5.079 5.321 5.573 5.836 6.109 6.392 6.68 6.971 7.258 7.528 7.764 7.942 8.039 8.05 8.046 8.019 7.969 7.896 7.804 7.696 7.572 7.436 7.289 7.132 6.968 6.799 6.624 6.446 6.266 6.085 5.904 5.723 5.543 5.364 5.188 5.015 4.844 4.677 4.513 4.354 4.198 4.046 3.898 3.754 3.615 3.48 3.349 3.222 3.1 2.981 2.867 2.756 2.649 2.546 2.447 2.351 2.259 2.17 2.085 2.003 1.923 1.847 1.774 1.703 1.635 1.57 1.508 1.447 1.39 1.334 1.28 1.229 1.18 1.132 1.087 1.043 1.001 0.961 0.922 0.885 0.85 0.815 0.783 0.751 0.721 0.692 0.664 0.637 0.611 0.587 0.563 0.54 0.518 0.497 0.477 0.458 0.44 0.422 0.405 0.388 0.373 0.358 0.343 0.329 0.316 0.303 0.291 0.279 0.268 0.257 0.247 0.237 0.227 0.218 0.209 0.201

</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="8.05" PeakHeight="457.358" Num="5" zHalfNm="407.283" Error="6.691">
-205.141 -61.855 31.023 -3.877 -2.046
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="105.462" Depth="0.154"/>
<TopsideChapman PeakHeight="457.358" PeakDensity="804001.25" PeakScaleHeight="37.847" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
