<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.19 (078) 09:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607803190920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="6.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.440" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.018" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.450" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" 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="6.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="310.930" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.489" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="249.197" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="204.836" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.876" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.850" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="59.410" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.147" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="31.438" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="72.310" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.330" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.750" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="34">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 270.000 270.000 280.000 281.667 283.333 285.000 282.500 280.000 280.000 285.000 285.000 290.000 300.000 300.252 300.532 300.845 301.196 301.593 302.046 302.568 303.175 303.891 304.747 305.789 307.085 308.740 310.930 313.960 318.432 325.695 339.546 376.389
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 69 69 63 54 0 0 48 0 63 60 60 63 63 51 48 48 54 51 63 0 69 63 0 66 66 63 63 0 60 57 0 57 51
</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 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="53">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 125.000 125.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 125.000 125.000 125.000 120.000 120.000 120.000 120.000 125.000 130.000 120.000 120.000 120.000 121.250 122.500 123.750 125.000 125.000 125.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 75 60 0 0 72 0 63 0 60 63 0 0 0 60 63 66 0 63 66 57 60 60 0 60 72 72 72 0 63 0 69 69 69 57 0 0 0 0 0 0 0 57 60 0 54 57 60 60 0 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 -1.171875 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="117">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.941 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.349 125.0 130.0 132.698 135.0 140.0 144.047 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 249.197 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.205 0.995 1.29 1.441 1.489 1.461 1.376 1.342 1.342 1.342 1.342 1.372 1.437 1.489 1.527 1.735 1.962 2.208 2.47 2.739 3.009 3.276 3.538 3.793 4.044 4.29 4.533 4.774 5.014 5.253 5.492 5.729 5.962 6.179 6.346 6.4 6.4 6.38 6.332 6.259 6.165 6.052 5.924 5.784 5.632 5.473 5.308 5.138 4.966 4.792 4.619 4.446 4.275 4.107 3.941 3.779 3.622 3.468 3.319 3.175 3.035 2.9 2.77 2.645 2.525 2.41 2.299 2.192 2.091 1.993 1.9 1.811 1.725 1.644 1.566 1.491 1.421 1.353 1.288 1.227 1.168 1.112 1.059 1.008 0.959 0.913 0.869 0.827 0.787 0.749 0.713 0.679 0.646 0.615 0.585 0.557 0.53 0.504 0.48 0.457 0.435 0.414 0.394 0.374 0.356 0.339 0.323 0.307 0.292 0.278 0.265 0.252 0.239 0.228 0.217 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.489" PeakHeight="110.0" Num="3" Error="0.0">
-28.096 9.853 -1.816
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.489" EndFrequency="6.4" PeakHeight="249.197" Num="5" zHalfNm="204.836" Error="1.425">
-91.954 -21.336 11.764 -4.463 0.839
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="34.047" Depth="0.147"/>
<TopsideChapman PeakHeight="249.197" PeakDensity="508188.6" PeakScaleHeight="31.438" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
