<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-18 -077 16:20:00.000"
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" >
2026.03.18 (077) 16:20:00</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">
FF202607703181620009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.496" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.459" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.050" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="3.348" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.341" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="363.239" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.454" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.833" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="159.406" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.877" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="89.406" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="193.770" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="98">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 284.286 288.571 292.857 297.143 301.429 305.714 310.000 315.000 316.667 318.333 320.000 320.000 320.000 322.500 325.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 341.667 343.333 345.000 345.000 347.500 350.000 355.000 356.250 357.500 358.750 360.000 360.000 362.000 364.000 366.000 368.000 370.000 375.000 377.727 380.455 383.182 385.909 388.636 391.364 394.091 396.818 399.545 402.273 405.000 410.000 410.000 410.000 420.000 420.000 425.000 425.000 435.000 435.000 440.000 440.000 445.000 450.000 455.000 455.000 460.000 465.000 470.000 475.000 475.000 485.000 490.000 495.000 495.000 500.000 505.000 510.000 515.000 520.000 530.000 535.000 545.000 550.000 559.843 571.080 584.029 599.114 616.912 638.225 664.210
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 0 0 48 0 48 48 0 0 45 57 51 0 60 60 60 60 57 54 54 57 51 0 51 48 57 51 0 0 54 48 0 57 57 0 0 0 57 57 0 0 54 0 51 57 0 0 0 60 0 0 0 0 57 0 57 57 69 69 63 66 60 63 60 63 60 54 54 57 51 54 48 54 60 60 60 60 57 60 63 60 60 60 63 57 57 57 60 57 60 60 54 57 54 0 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.953125 -2.734375 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 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 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 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
</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" >
89.49 90.0 95.0 100.0 105.0 110.0 111.724 113.449 115.0 115.173 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 363.239 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.252 2.897 3.239 3.348 3.225 3.225 3.336 3.348 3.495 3.632 3.762 3.889 4.014 4.139 4.265 4.392 4.521 4.653 4.788 4.926 5.067 5.21 5.357 5.507 5.659 5.813 5.968 6.125 6.283 6.442 6.6 6.758 6.915 7.072 7.227 7.381 7.533 7.684 7.832 7.979 8.124 8.267 8.407 8.545 8.68 8.811 8.94 9.064 9.184 9.298 9.405 9.504 9.592 9.668 9.728 9.772 9.796 9.8 9.8 9.795 9.784 9.768 9.746 9.72 9.688 9.652 9.612 9.567 9.519 9.466 9.41 9.351 9.289 9.223 9.155 9.084 9.01 8.935 8.857 8.777 8.696 8.613 8.528 8.442 8.354 8.266 8.177 8.086 7.995 7.904 7.811 7.719 7.626 7.533 7.439 7.346 7.252 7.158 7.065 6.972 6.879 6.786 6.694 6.602 6.51 6.419 6.329 6.239 6.15 6.061 5.973 5.886 5.799 5.713 5.628 5.544 5.461 5.378 5.296 5.215 5.135 5.056 4.978 4.9 4.824 4.748 4.674 4.6 4.527 4.455 4.384 4.314 4.245 4.177 4.11 4.043 3.978 3.913 3.85 3.787 3.725 3.664 3.604 3.545 3.486 3.429 3.372 3.316 3.261 3.207 3.154 3.101 3.049 2.999 2.948 2.899 2.85 2.803 2.755 2.709 2.664 2.619 2.574 2.531 2.488 2.446 2.405 2.364 2.324 2.284 2.246 2.208 2.17 2.133 2.097 2.061 2.026 1.991 1.957 1.924 1.891 1.859 1.827 1.796 1.765 1.735

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.348" PeakHeight="110.0" Num="3" Error="0.0">
-30.471 13.107 -3.146
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.348" EndFrequency="9.8" PeakHeight="363.239" Num="5" zHalfNm="240.454" Error="5.319">
-217.728 -40.671 12.334 -4.407 2.406
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.173" Depth="0.123"/>
<TopsideChapman PeakHeight="363.239" PeakDensity="1191563.2" PeakScaleHeight="89.406" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
