<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 00:50:00.000"
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 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2</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" >
2026.03.30 (089) 00:50:00</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">
FF202608903300050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.562" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.754" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="7.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="521.667" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="429.467" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="370.215" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.125" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="87.412" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.618" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.610" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="91.710" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.650" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="116">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.35 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 345.000 355.000 355.000 365.000 365.000 365.000 367.500 370.000 375.000 375.000 375.000 370.000 370.000 370.000 372.500 375.000 375.000 375.000 375.000 375.000 375.000 375.000 372.000 369.000 366.000 363.000 360.000 370.000 370.000 372.917 375.833 378.750 381.667 384.583 387.500 390.417 393.333 396.250 399.167 402.083 405.000 407.500 410.000 412.500 415.000 415.000 412.500 410.000 402.500 395.000 397.500 400.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 420.000 421.667 423.333 425.000 430.000 430.000 430.000 435.000 436.250 437.500 438.750 440.000 450.000 450.000 452.500 455.000 453.333 451.667 450.000 450.714 451.429 452.143 452.857 453.571 454.286 455.000 460.000 462.500 465.000 467.500 470.000 470.000 472.500 475.000 472.500 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 521.667 528.333 535.000 555.603 587.017
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 57 63 57 54 57 0 57 57 0 60 57 57 63 0 57 60 0 0 63 0 63 51 0 0 63 57 60 63 57 57 0 0 0 54 0 60 63 60 0 57 0 57 0 54 60 0 54 0 0 0 63 57 0 0 63 54 63 0 0 57 60 0 60 63 60 0 0 60 60 0 63 60 0 57 60 60 60 60 0 60 60 0 57 60 57 60 63 60 57 60 60 0 63 54 57 57 60 57 0 54 0 57 0 57 0 51 0 57 60 0 54 60 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 -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 0.390625 -0.390625 1.171875 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 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -2.734375 0.390625 -2.734375 0.390625 0.390625 -0.390625 1.171875 -0.390625 0.390625 -0.390625 1.171875 1.953125 0.390625 0.390625 1.171875 1.171875
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.813 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.625 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.438 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 429.467 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.316 0.293 0.262 0.219 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.227 0.248 0.269 0.289 0.31 0.331 0.352 0.354 0.414 0.486 0.564 0.648 0.738 0.834 0.938 1.049 1.167 1.293 1.427 1.569 1.72 1.88 2.049 2.228 2.416 2.614 2.822 3.04 3.268 3.507 3.755 4.013 4.28 4.555 4.838 5.126 5.419 5.715 6.01 6.303 6.589 6.864 7.124 7.364 7.578 7.762 7.91 8.017 8.081 8.1 8.1 8.088 8.058 8.011 7.949 7.872 7.783 7.683 7.573 7.454 7.327 7.194 7.055 6.911 6.764 6.614 6.462 6.308 6.154 5.999 5.844 5.689 5.536 5.384 5.234 5.085 4.939 4.795 4.653 4.515 4.378 4.245 4.115 3.987 3.863 3.741 3.623 3.508 3.396 3.286 3.18 3.077 2.977 2.879 2.785 2.693 2.604 2.518 2.434 2.353 2.275 2.199 2.125 2.054 1.985 1.918 1.853 1.791 1.73 1.671 1.615 1.56 1.507 1.456 1.406 1.358 1.312 1.267 1.224 1.182 1.142 1.103 1.065 1.029 0.993 0.959 0.927 0.895 0.864 0.835 0.806 0.778 0.752 0.726 0.701 0.677 0.654 0.631 0.609 0.589 0.568 0.549 0.53 0.512 0.494 0.477 0.461 0.445 0.43 0.415 0.401 0.387 0.373 0.361 0.348 0.336 0.325 0.314 0.303 0.292 0.282 0.273 0.263 0.254 0.245

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.1" PeakHeight="429.467" Num="5" zHalfNm="370.215" Error="2.383">
-196.273 -21.243 9.237 -0.725 -0.025
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.438" Depth="0.154"/>
<TopsideChapman PeakHeight="429.467" PeakDensity="814019.9" PeakScaleHeight="44.61" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
