<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-17 -076 16:40:00.000"
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" >
2026.03.17 (076) 16:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607603171640009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.562" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.878" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.000" 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="3.311" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.324" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="356.617" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="243.834" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.968" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="147.696" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.373" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="82.932" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="178.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 277.500 280.000 285.000 288.750 292.500 296.250 300.000 303.333 306.667 310.000 310.000 315.000 316.250 317.500 318.750 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 360.000 361.250 362.500 363.750 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 460.000 465.000 470.000 470.000 470.000 480.000 485.000 485.000 490.000 495.336 501.168 507.569 514.628 522.450 531.166 540.939 551.974 564.532 578.952 595.681 615.321 638.705
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 48 45 0 51 0 51 0 0 54 54 48 0 0 0 51 57 60 60 60 57 60 60 51 0 57 60 60 60 57 60 63 63 60 0 63 60 63 66 63 60 63 0 60 63 54 0 0 0 60 48 54 60 51 60 48 57 63 63 63 54 63 54 63 57 63 57 48 60 54 60 57 60 60 54 63 60 63 63 60 63 63 57 51 63 60 57 63 60 60 57 57 57 57 57 57 54 57 54 54 54 51 48 51 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 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 -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 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 2.734375
</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" >
89.495 90.0 95.0 100.0 105.0 110.0 111.874 113.748 115.0 115.622 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.617 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.227 2.865 3.203 3.311 3.188 3.188 3.27 3.311 3.447 3.586 3.717 3.844 3.969 4.094 4.22 4.348 4.478 4.61 4.746 4.885 5.029 5.176 5.327 5.482 5.641 5.803 5.969 6.137 6.309 6.482 6.656 6.831 7.007 7.183 7.358 7.532 7.705 7.876 8.045 8.213 8.378 8.54 8.699 8.855 9.007 9.155 9.298 9.434 9.564 9.684 9.794 9.891 9.973 10.037 10.079 10.099 10.1 10.098 10.09 10.075 10.054 10.026 9.993 9.954 9.91 9.86 9.806 9.747 9.684 9.618 9.547 9.473 9.395 9.315 9.232 9.146 9.058 8.967 8.875 8.781 8.685 8.587 8.489 8.389 8.289 8.187 8.085 7.982 7.879 7.775 7.671 7.567 7.463 7.359 7.256 7.152 7.049 6.946 6.844 6.742 6.641 6.54 6.44 6.341 6.242 6.145 6.048 5.952 5.857 5.763 5.669 5.577 5.486 5.396 5.307 5.219 5.132 5.046 4.961 4.877 4.794 4.713 4.632 4.553 4.475 4.397 4.321 4.246 4.173 4.1 4.028 3.957 3.888 3.819 3.752 3.686 3.62 3.556 3.493 3.43 3.369 3.309 3.25 3.191 3.134 3.077 3.022 2.967 2.914 2.861 2.809 2.758 2.708 2.659 2.611 2.563 2.516 2.471 2.425 2.381 2.338 2.295 2.253 2.212 2.171 2.131 2.092 2.054 2.016 1.979 1.942 1.907 1.871 1.837 1.803 1.77 1.737 1.705 1.674 1.643 1.612 1.582 1.553 1.524 1.496 1.469

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.311" PeakHeight="110.0" Num="3" Error="0.0">
-30.443 13.066 -3.128
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.311" EndFrequency="10.1" PeakHeight="356.617" Num="5" zHalfNm="243.834" Error="5.281">
-208.452 -40.93 9.169 -3.113 2.331
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.622" Depth="0.123"/>
<TopsideChapman PeakHeight="356.617" PeakDensity="1265632.8" PeakScaleHeight="82.932" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
