<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 21:10:00.000"
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" >
2026.03.27 (086) 21:10:00</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">
FF202608603272110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.834" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.603" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="441.697" 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="0.968" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="357.285" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="309.324" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.371" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.714" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.343" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="35.302" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="83.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="171">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 285.000 285.000 290.000 287.500 285.000 285.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 300.000 300.000 301.667 303.333 305.000 310.000 310.833 311.667 312.500 313.333 314.167 315.000 315.000 315.000 315.000 315.000 315.000 315.000 316.000 317.000 318.000 319.000 320.000 320.000 322.500 325.000 320.000 320.000 322.500 325.000 325.000 326.667 328.333 330.000 330.000 332.500 335.000 335.000 335.000 335.000 337.500 340.000 340.000 342.500 345.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 370.000 370.000 371.667 373.333 375.000 375.000 375.000 375.000 375.000 375.000 377.500 380.000 375.000 380.000 380.000 380.000 380.000 385.000 387.500 390.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 402.500 405.000 405.000 405.000 406.667 408.333 410.000 410.000 410.000 412.500 415.000 415.000 415.000 415.000 417.500 420.000 425.000 415.000 420.000 425.000 426.250 427.500 428.750 430.000 430.000 430.000 435.000 436.911 439.119 441.697 444.749 448.417 452.909 458.538 465.799 475.521
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 69 72 69 69 0 66 60 69 0 72 0 72 72 69 66 63 72 72 0 72 69 0 63 0 69 0 0 63 60 0 0 0 0 0 0 0 0 0 57 60 63 66 69 69 69 0 0 0 0 69 72 0 63 66 0 0 72 0 0 0 72 72 63 66 0 69 72 0 63 66 0 54 0 63 66 51 54 0 63 0 69 72 0 63 0 69 72 0 63 69 0 72 75 0 69 0 72 63 0 66 72 0 0 66 69 0 72 75 75 0 69 72 75 0 0 69 72 54 57 66 69 48 72 60 0 66 72 72 57 72 72 0 72 72 0 66 66 69 0 0 66 0 69 57 63 63 66 66 0 63 48 48 63 60 0 0 0 60 60 60 57 60 54 57 0 0 0 0 0 0
</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="160">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.306 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.693 130.0 135.0 140.0 145.0 145.386 150.0 155.0 160.0 163.079 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 357.285 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.644 0.839 0.937 0.968 0.952 0.902 0.812 0.743 0.743 0.743 0.743 0.743 0.743 0.802 0.865 0.929 0.968 1.024 1.156 1.279 1.403 1.53 1.662 1.8 1.947 2.103 2.27 2.446 2.635 2.835 3.048 3.273 3.51 3.76 4.021 4.294 4.577 4.871 5.175 5.489 5.811 6.143 6.484 6.834 7.192 7.56 7.936 8.32 8.712 9.111 9.515 9.917 10.308 10.669 10.962 11.13 11.15 11.144 11.1 11.02 10.905 10.761 10.591 10.399 10.187 9.96 9.72 9.47 9.213 8.949 8.682 8.413 8.143 7.874 7.608 7.344 7.084 6.828 6.578 6.333 6.093 5.86 5.634 5.414 5.2 4.993 4.794 4.6 4.414 4.233 4.06 3.892 3.731 3.576 3.427 3.284 3.146 3.014 2.887 2.765 2.647 2.535 2.427 2.324 2.225 2.13 2.039 1.952 1.868 1.788 1.711 1.638 1.567 1.5 1.435 1.374 1.314 1.258 1.204 1.152 1.102 1.054 1.009 0.965 0.924 0.884 0.846 0.809 0.774 0.741 0.709 0.678 0.649 0.621 0.594 0.568 0.544 0.52 0.498 0.476 0.455 0.436 0.417 0.399 0.382 0.365 0.349 0.334 0.32 0.306 0.293 0.28 0.268 0.256 0.245 0.235 0.224 0.215 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.968" PeakHeight="110.0" Num="3" Error="0.0">
-26.36 7.847 -1.181
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.968" EndFrequency="11.15" PeakHeight="357.285" Num="5" zHalfNm="309.324" Error="2.6">
-158.273 -50.107 16.557 -4.652 2.269
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="53.079" Depth="0.225"/>
<TopsideChapman PeakHeight="357.285" PeakDensity="1542462.8" PeakScaleHeight="35.302" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
