<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 17:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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) 17:10:00</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">
FF202608403251710009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.596" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.758" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" 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="3.228" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.285" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="358.088" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="254.764" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.150" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="138.991" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.678" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.434" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="163.660" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.520" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="137">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 285.000 285.000 287.500 290.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 301.250 302.500 303.750 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 340.000 342.500 345.000 345.000 347.500 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 410.000 410.000 410.000 412.500 415.000 415.000 415.000 417.500 420.000 422.500 425.000 430.000 430.000 432.500 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 457.500 460.000 465.000 470.000 472.500 475.000 480.000 486.250 492.500 498.750 505.000 515.000 520.000 525.000 530.000 540.000 550.000 560.000 572.500 585.000 605.000 625.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 48 0 48 45 0 51 51 48 51 0 54 54 0 0 0 57 57 54 54 54 54 57 57 54 54 54 57 57 57 60 57 57 54 0 60 63 60 57 54 63 60 60 60 63 63 63 60 63 51 0 57 63 48 51 63 0 51 57 63 66 57 63 51 57 60 63 63 63 66 57 63 63 60 63 63 60 63 57 60 51 57 63 66 60 63 51 57 48 63 60 48 57 60 0 57 0 60 0 57 48 57 45 51 42 51 54 48 54 51 51 51 51 51 0 51 51 48 0 45 45 0 0 0 48 42 48 0 48 51 48 45 45 45 0 45
</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 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 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 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.509 90.0 95.0 100.0 105.0 110.0 112.224 114.448 115.0 116.672 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 358.088 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.171 2.794 3.123 3.228 3.106 3.106 3.136 3.228 3.354 3.522 3.679 3.831 3.98 4.128 4.278 4.431 4.586 4.745 4.908 5.075 5.248 5.426 5.61 5.799 5.994 6.194 6.399 6.608 6.822 7.04 7.261 7.484 7.71 7.936 8.163 8.39 8.616 8.842 9.066 9.288 9.508 9.725 9.938 10.147 10.352 10.551 10.743 10.927 11.102 11.265 11.414 11.546 11.658 11.747 11.81 11.844 11.85 11.849 11.841 11.823 11.796 11.761 11.717 11.666 11.608 11.543 11.471 11.393 11.31 11.221 11.128 11.03 10.928 10.821 10.712 10.599 10.483 10.364 10.243 10.12 9.995 9.869 9.741 9.612 9.482 9.351 9.219 9.087 8.955 8.823 8.69 8.558 8.426 8.295 8.164 8.033 7.904 7.775 7.647 7.52 7.394 7.269 7.145 7.022 6.901 6.781 6.662 6.545 6.429 6.314 6.201 6.089 5.979 5.87 5.763 5.657 5.553 5.45 5.349 5.249 5.151 5.054 4.959 4.866 4.773 4.683 4.594 4.506 4.42 4.335 4.252 4.17 4.089 4.01 3.933 3.856 3.781 3.708 3.635 3.564 3.495 3.426 3.359 3.293 3.228 3.165 3.102 3.041 2.981 2.922 2.864 2.808 2.752 2.697 2.644 2.591 2.54 2.489 2.44 2.391 2.343 2.297 2.251 2.206 2.162 2.119 2.076 2.035 1.994 1.954 1.915 1.877 1.839 1.802 1.766 1.73 1.696 1.662 1.628 1.595 1.563 1.532 1.501 1.471 1.441 1.412

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.228" PeakHeight="110.0" Num="3" Error="0.0">
-30.379 12.973 -3.085
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.228" EndFrequency="11.85" PeakHeight="358.088" Num="5" zHalfNm="254.764" Error="5.288">
-210.541 -39.168 8.453 -2.351 2.191
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.672" Depth="0.122"/>
<TopsideChapman PeakHeight="358.088" PeakDensity="1742214.6" PeakScaleHeight="76.434" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
