<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-04 -063 09:20:00.000"
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: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.03.04 (063) 09:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606303040920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="6.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.083" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.192" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.350" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" 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="6.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="350.000" 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="1.428" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="306.143" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="231.845" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.876" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.750" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="106.187" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.258" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.810" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="96.030" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.200" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.900" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="74">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 260.000 260.000 265.000 265.000 265.000 265.000 260.000 260.000 260.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 275.000 275.000 275.000 275.000 277.500 280.000 282.500 285.000 287.500 290.000 290.000 290.000 290.000 292.500 295.000 297.500 300.000 300.000 300.000 302.000 304.000 306.000 308.000 310.000 310.000 310.000 310.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 340.000 340.000 345.000 350.000 350.000 360.000 365.000 375.000 385.000 395.000 412.260 436.101 471.175 527.867 635.063
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 66 63 54 0 0 63 60 54 51 60 63 0 66 0 66 0 63 66 0 54 51 0 60 0 0 69 54 0 0 66 51 0 60 63 0 66 0 63 51 54 60 63 0 60 0 0 63 66 66 63 54 63 66 63 69 66 69 69 63 69 69 69 69 69 66 69 66 66 66 57 54 57 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 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 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="13">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 115.000 115.000 115.000 115.000 112.500 110.000 110.000 110.000 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 57 0 54 60 63 0 51 63 0 63 57 54
</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
</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" >
89.969 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.807 125.0 130.0 133.615 135.0 140.0 145.0 145.422 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 306.143 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.203 0.954 1.237 1.382 1.428 1.402 1.322 1.278 1.278 1.278 1.278 1.296 1.359 1.423 1.428 1.558 1.708 1.861 2.014 2.167 2.322 2.479 2.64 2.806 2.98 3.162 3.354 3.56 3.78 4.016 4.267 4.532 4.803 5.069 5.32 5.547 5.746 5.917 6.062 6.183 6.284 6.366 6.432 6.482 6.518 6.54 6.55 6.55 6.547 6.536 6.516 6.489 6.454 6.412 6.364 6.31 6.251 6.186 6.118 6.045 5.968 5.889 5.806 5.721 5.634 5.545 5.454 5.362 5.269 5.175 5.08 4.985 4.89 4.795 4.7 4.606 4.512 4.418 4.325 4.233 4.142 4.052 3.962 3.874 3.787 3.702 3.617 3.534 3.452 3.371 3.292 3.214 3.138 3.063 2.99 2.918 2.847 2.778 2.71 2.643 2.578 2.515 2.452 2.391 2.332 2.274 2.217 2.161 2.107 2.053 2.002 1.951 1.901 1.853 1.806 1.76 1.715 1.671 1.628 1.587 1.546 1.506 1.467 1.43 1.393 1.357 1.322 1.288 1.254 1.222 1.19 1.159 1.129 1.1 1.072 1.044 1.017 0.99 0.964 0.939 0.915 0.891 0.868 0.845 0.823 0.802 0.781 0.76 0.741 0.721 0.702 0.684 0.666 0.649 0.632 0.615 0.599 0.584 0.568 0.554 0.539 0.525 0.511 0.498 0.485 0.472 0.46 0.448 0.436 0.425 0.413 0.403 0.392 0.382 0.372 0.362 0.353 0.343 0.334 0.326 0.317 0.309 0.301 0.293 0.285 0.278 0.27

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.428" PeakHeight="110.0" Num="3" Error="0.0">
-27.95 9.669 -1.75
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.428" EndFrequency="6.55" PeakHeight="306.143" Num="5" zHalfNm="231.845" Error="3.92">
-164.484 10.239 -12.438 7.992 -2.03
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="35.422" Depth="0.15"/>
<TopsideChapman PeakHeight="306.143" PeakDensity="532289.06" PeakScaleHeight="58.81" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
