<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-17 -076 21:40:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2 cusps do not match</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) 21:40:00</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">
FF202607603172140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.496" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.460" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" 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="0.518" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="422.319" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="352.630" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.058" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="102.553" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.966" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="51.703" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="105.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="165">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
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</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 0 51 66 66 63 0 0 0 0 0 0 0 66 69 69 57 0 0 0 0 0 54 72 72 69 63 0 0 0 0 0 60 0 0 0 0 63 0 0 66 0 0 0 0 63 66 0 0 0 63 66 0 57 0 66 48 63 0 63 0 66 0 66 0 63 0 51 0 60 0 66 0 57 60 0 66 0 0 0 0 69 57 0 66 66 0 66 66 54 60 63 0 69 57 60 0 69 60 66 66 54 72 66 69 57 66 0 57 63 66 69 72 66 69 60 63 48 0 63 66 66 60 48 54 63 51 60 66 66 63 63 60 66 57 63 66 60 54 60 60 60 0 0 60 60 0 54 57 54 54 51 54 0 51 48 48 45 42 45 45 45 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
91.527 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.685 140.0 145.0 150.0 155.0 160.0 165.0 165.371 170.0 175.0 180.0 185.0 190.0 193.056 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 422.319 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.343 0.449 0.502 0.518 0.511 0.49 0.452 0.393 0.299 0.221 0.221 0.221 0.221 0.221 0.221 0.221 0.221 0.271 0.324 0.378 0.432 0.485 0.518 0.564 0.659 0.748 0.837 0.93 1.029 1.136 1.253 1.38 1.519 1.672 1.839 2.021 2.219 2.431 2.659 2.899 3.152 3.416 3.688 3.969 4.257 4.55 4.848 5.15 5.456 5.764 6.075 6.387 6.701 7.016 7.33 7.644 7.955 8.264 8.567 8.864 9.151 9.426 9.684 9.92 10.131 10.309 10.45 10.546 10.595 10.6 10.597 10.578 10.541 10.488 10.419 10.337 10.242 10.135 10.018 9.892 9.757 9.614 9.465 9.311 9.151 8.988 8.821 8.651 8.479 8.306 8.131 7.956 7.781 7.607 7.433 7.259 7.088 6.917 6.749 6.582 6.418 6.256 6.096 5.939 5.784 5.633 5.484 5.338 5.194 5.054 4.917 4.783 4.651 4.523 4.398 4.275 4.156 4.039 3.925 3.814 3.706 3.601 3.498 3.398 3.301 3.206 3.114 3.024 2.937 2.852 2.769 2.689 2.611 2.535 2.461 2.389 2.319 2.251 2.185 2.121 2.059 1.998 1.94 1.883 1.827 1.773 1.721 1.67 1.621 1.573 1.527 1.482 1.438 1.395 1.354 1.314 1.275 1.237 1.201 1.165 1.131 1.097 1.064 1.033 1.002 0.973 0.944 0.916 0.888 0.862 0.836 0.812 0.788 0.764 0.741 0.719 0.698 0.677 0.657 0.638 0.619 0.6 0.582 0.565 0.548 0.532

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.518" PeakHeight="110.0" Num="3" Error="0.0">
-22.589 4.549 -0.433
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.518" EndFrequency="10.6" PeakHeight="422.319" Num="5" zHalfNm="352.63" Error="4.457">
-217.721 -20.441 10.99 -5.449 3.358
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="83.056" Depth="0.297"/>
<TopsideChapman PeakHeight="422.319" PeakDensity="1394044.6" PeakScaleHeight="51.703" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
