<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 09:10:00.000"
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: 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" >
2026.03.23 (082) 09:10:00</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">
FF202608203230910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.160" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.382" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="5.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="327.019" 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="1.293" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="297.762" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="224.451" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.530" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="105.869" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.723" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.014" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="86.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="72">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 255.000 255.000 255.000 255.000 252.500 250.000 250.000 255.000 255.000 255.000 255.000 256.000 257.000 258.000 259.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 270.000 270.000 270.000 265.000 270.000 270.000 270.000 270.000 270.000 271.250 272.500 273.750 275.000 275.000 280.000 280.000 280.000 280.000 282.500 285.000 287.500 290.000 290.000 295.000 295.000 300.000 300.000 305.000 305.000 310.000 315.000 317.482 320.270 323.423 327.019 331.158 335.973 341.644 348.423 356.668 366.913 379.986 397.246 421.087 456.161 512.853 620.049
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 66 0 69 63 0 57 63 69 0 0 66 0 63 0 0 0 0 54 0 0 0 0 54 0 0 0 57 0 0 57 54 57 0 0 0 60 63 54 60 60 63 45 0 0 63 66 72 72 72 78 75 78 78 72 75 72 72 72 69 69 69 72 72 69 69 66 66 54 51 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 2.734375 0.390625 0.390625 0.390625 0.390625 -2.734375 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 2.734375 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 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125
</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" >
90.042 95.0 100.0 105.0 110.0 115.0 120.0 122.946 125.0 130.0 135.0 135.893 140.0 145.0 148.839 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 297.762 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.863 1.12 1.252 1.293 1.27 1.2 1.134 1.134 1.134 1.134 1.134 1.184 1.246 1.293 1.323 1.474 1.648 1.829 2.007 2.185 2.363 2.545 2.734 2.934 3.148 3.382 3.641 3.931 4.254 4.599 4.939 5.241 5.494 5.701 5.868 6.004 6.115 6.206 6.279 6.338 6.383 6.416 6.437 6.448 6.45 6.449 6.441 6.424 6.4 6.368 6.329 6.284 6.233 6.176 6.115 6.049 5.979 5.905 5.828 5.748 5.666 5.581 5.494 5.405 5.316 5.225 5.133 5.04 4.947 4.854 4.761 4.667 4.574 4.482 4.39 4.298 4.208 4.118 4.029 3.941 3.854 3.768 3.683 3.6 3.517 3.436 3.357 3.279 3.202 3.126 3.052 2.979 2.907 2.837 2.769 2.702 2.636 2.571 2.508 2.446 2.386 2.326 2.269 2.212 2.157 2.103 2.05 1.998 1.948 1.899 1.851 1.804 1.758 1.713 1.67 1.627 1.586 1.545 1.506 1.467 1.429 1.393 1.357 1.322 1.288 1.255 1.223 1.191 1.16 1.13 1.101 1.073 1.045 1.018 0.991 0.966 0.941 0.916 0.893 0.869 0.847 0.825 0.803 0.783 0.762 0.742 0.723 0.704 0.686 0.668 0.651 0.634 0.617 0.601 0.586 0.57 0.555 0.541 0.527 0.513 0.5 0.487 0.474 0.462 0.45 0.438 0.426 0.415 0.404 0.394 0.384 0.374 0.364 0.354 0.345 0.336 0.327 0.319 0.31 0.302 0.294 0.287 0.279 0.272 0.265 0.258

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.293" PeakHeight="110.0" Num="3" Error="0.0">
-27.575 9.215 -1.598
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.293" EndFrequency="6.45" PeakHeight="297.762" Num="5" zHalfNm="224.451" Error="3.788">
-163.208 25.944 -19.529 11.101 -3.231
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="38.839" Depth="0.159"/>
<TopsideChapman PeakHeight="297.762" PeakDensity="516160.06" PeakScaleHeight="59.014" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
