<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 08:30:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2x cusp not found, 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" >
2026.03.30 (089) 08:30:00</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">
FF202608903300830009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="3.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.347" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.381" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.500" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="280.000" 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="0.551" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="279.823" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.214" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.159" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.850" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="74.811" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.401" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.716" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="57.400" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.690" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.100" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="27">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 247.500 250.000 252.500 255.000 257.500 260.000 262.500 265.000 270.000 275.000 280.000 290.000 305.000 316.938 330.294 345.338 362.410 381.951 404.537
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 0 66 0 66 69 63 0 0 0 66 0 57 0 66 66 69 66 63 63 63 54 63 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.171875 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 2.734375 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 112.500 110.000 111.250 112.500 113.750 115.000 110.000 110.000 110.000 110.000 110.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 57 0 60 0 54 51 57 0 51 0 0 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 -1.953125 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="129">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.335 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.231 140.0 145.0 150.0 155.0 160.0 164.462 165.0 170.0 175.0 180.0 185.0 190.0 191.693 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 279.823 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.365 0.477 0.533 0.551 0.543 0.52 0.479 0.415 0.313 0.243 0.243 0.243 0.243 0.243 0.243 0.243 0.249 0.306 0.362 0.419 0.475 0.532 0.551 0.649 0.779 0.923 1.106 1.373 1.797 2.25 2.563 2.78 2.942 3.067 3.165 3.242 3.301 3.346 3.376 3.394 3.4 3.4 3.395 3.38 3.358 3.327 3.29 3.246 3.198 3.144 3.087 3.026 2.962 2.896 2.828 2.759 2.689 2.618 2.547 2.475 2.404 2.334 2.264 2.195 2.126 2.059 1.993 1.929 1.865 1.804 1.743 1.684 1.627 1.571 1.517 1.464 1.412 1.363 1.314 1.268 1.222 1.179 1.136 1.095 1.055 1.017 0.98 0.944 0.91 0.876 0.844 0.813 0.783 0.754 0.726 0.699 0.673 0.648 0.624 0.601 0.579 0.557 0.536 0.516 0.497 0.478 0.461 0.443 0.427 0.411 0.395 0.381 0.366 0.353 0.339 0.327 0.314 0.303 0.291 0.28 0.27 0.26 0.25 0.24 0.231 0.223 0.214 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.551" PeakHeight="110.0" Num="3" Error="0.0">
-23.062 4.89 -0.493
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.551" EndFrequency="3.4" PeakHeight="279.823" Num="5" zHalfNm="227.214" Error="3.035">
-108.169 31.791 -16.154 4.142 0.26
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="81.693" Depth="0.308"/>
<TopsideChapman PeakHeight="279.823" PeakDensity="143424.31" PeakScaleHeight="40.716" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
