<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-02 -092 16:50:00.000"
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: 100%</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" >
2026.04.02 (092) 16:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609204021650009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.433" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.262" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="520.000" 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="3.268" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.303" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="403.481" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="290.196" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.899" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="152.831" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="75.294" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="84.174" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="189.730" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="153">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 287.500 290.000 290.000 295.000 295.000 300.000 300.000 305.000 305.000 305.000 310.000 310.000 312.500 315.000 315.000 315.000 317.500 320.000 322.500 325.000 327.500 330.000 330.000 332.500 335.000 337.500 340.000 340.000 341.667 343.333 345.000 345.000 345.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 365.000 366.667 368.333 370.000 370.000 375.000 377.500 380.000 375.000 380.000 385.000 387.500 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 407.500 410.000 410.000 415.000 415.000 417.500 420.000 420.000 420.000 420.000 425.000 430.000 430.000 430.000 432.500 435.000 435.000 440.000 440.000 442.500 445.000 440.000 440.000 441.667 443.333 445.000 455.000 455.000 455.000 457.500 460.000 455.000 455.000 455.000 455.000 460.000 460.000 465.000 465.000 465.000 466.667 468.333 470.000 470.000 470.000 471.667 473.333 475.000 476.667 478.333 480.000 482.500 485.000 487.500 490.000 490.000 490.000 490.000 495.000 500.000 502.500 505.000 510.000 515.000 517.500 520.000 520.000 525.000 520.000 535.000 537.500 540.000 545.000 550.000 555.000 560.000 565.000 575.000 580.000 585.000 595.000 600.000 613.750 627.500 641.250 655.000 675.000 700.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 51 57 57 63 60 63 60 66 63 63 66 0 63 48 60 0 0 0 57 0 57 60 0 54 0 51 57 0 0 60 60 60 48 0 60 48 0 57 63 63 60 0 0 60 63 60 0 51 63 0 57 0 51 57 60 51 60 66 54 60 45 57 60 0 57 60 54 63 51 60 63 66 63 45 57 60 69 0 60 66 60 63 0 54 60 60 0 0 48 54 0 63 0 54 63 57 54 48 60 57 60 60 60 0 0 57 0 57 0 0 0 0 0 57 0 54 0 54 57 54 48 0 54 0 54 51 45 0 51 57 54 51 51 0 57 57 57 57 57 54 51 54 54 51 45 45 0 42 42 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -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 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -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 -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 1.171875 -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" >
89.502 90.0 95.0 100.0 105.0 110.0 112.055 114.111 115.0 116.166 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 403.481 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.198 2.828 3.162 3.268 3.146 3.146 3.199 3.268 3.388 3.54 3.688 3.834 3.979 4.124 4.269 4.414 4.56 4.708 4.857 5.007 5.159 5.313 5.469 5.627 5.788 5.95 6.115 6.282 6.452 6.623 6.798 6.975 7.154 7.336 7.52 7.707 7.896 8.087 8.281 8.477 8.676 8.876 9.078 9.282 9.488 9.695 9.903 10.112 10.322 10.531 10.74 10.947 11.152 11.354 11.552 11.744 11.929 12.103 12.267 12.415 12.547 12.658 12.746 12.808 12.843 12.85 12.85 12.843 12.827 12.804 12.772 12.734 12.688 12.636 12.577 12.512 12.441 12.365 12.284 12.198 12.108 12.013 11.914 11.812 11.707 11.598 11.486 11.372 11.256 11.137 11.016 10.894 10.77 10.645 10.518 10.391 10.263 10.134 10.004 9.874 9.744 9.614 9.483 9.353 9.223 9.093 8.964 8.835 8.707 8.579 8.452 8.326 8.201 8.076 7.953 7.83 7.708 7.588 7.469 7.351 7.234 7.118 7.003 6.89 6.778 6.667 6.558 6.45 6.343 6.237 6.133 6.031 5.929 5.829 5.731 5.633 5.538 5.443 5.35 5.258 5.167 5.078 4.99 4.904 4.819 4.735 4.652 4.571 4.491 4.412 4.334 4.258 4.183 4.109 4.036 3.965 3.894 3.825 3.757 3.69 3.625 3.56 3.496 3.434 3.372 3.312 3.252 3.194 3.136 3.08 3.025 2.97 2.917 2.864 2.812 2.761 2.711 2.662 2.614 2.567 2.52 2.475 2.43 2.386 2.342 2.3

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.268" PeakHeight="110.0" Num="3" Error="0.0">
-30.41 13.018 -3.106
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.268" EndFrequency="12.85" PeakHeight="403.481" Num="5" zHalfNm="290.196" Error="2.828">
-244.839 -56.263 13.971 -0.701 0.517
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.166" Depth="0.122"/>
<TopsideChapman PeakHeight="403.481" PeakDensity="2048666.2" PeakScaleHeight="84.174" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
