<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-19 -050 09:00:00.000"
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: 95% 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" >
2026.02.19 (050) 09:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202605002190900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="5.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.311" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.382" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.800" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" 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="4.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="315.521" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.965" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="277.183" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="219.851" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.294" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.000" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="81.664" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.385" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.437" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="73.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="35">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 260.000 260.000 260.000 260.000 265.000 270.000 267.500 265.000 270.000 275.000 280.000 275.000 275.000 275.000 278.333 281.667 285.000 285.000 285.000 290.000 295.000 295.000 297.789 301.064 304.963 309.686 315.521 322.918 332.596 345.807 364.914 395.000 449.342 577.081
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 54 66 69 66 57 0 57 51 0 48 57 0 0 0 0 54 60 66 66 63 66 66 66 66 69 69 66 69 66 63 57 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.171875 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 1.171875 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="17">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.05 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 125.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 48 0 60 0 0 0 0 0 72 69
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="149">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.31 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.784 130.0 135.0 140.0 145.0 145.568 150.0 155.0 160.0 163.352 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 277.183 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.642 0.836 0.934 0.965 0.949 0.899 0.809 0.738 0.738 0.738 0.738 0.738 0.738 0.795 0.858 0.922 0.965 1.011 1.163 1.333 1.52 1.723 1.944 2.188 2.456 2.752 3.07 3.4 3.722 4.018 4.278 4.5 4.686 4.839 4.964 5.063 5.14 5.195 5.231 5.248 5.25 5.248 5.235 5.21 5.175 5.13 5.076 5.014 4.946 4.871 4.791 4.706 4.618 4.526 4.431 4.334 4.236 4.136 4.036 3.935 3.834 3.734 3.634 3.534 3.436 3.339 3.243 3.149 3.056 2.965 2.875 2.788 2.702 2.618 2.537 2.457 2.379 2.303 2.23 2.158 2.088 2.02 1.954 1.89 1.828 1.767 1.709 1.652 1.597 1.544 1.492 1.442 1.394 1.347 1.301 1.257 1.215 1.173 1.134 1.095 1.058 1.022 0.987 0.953 0.921 0.889 0.859 0.83 0.801 0.774 0.747 0.721 0.697 0.673 0.65 0.627 0.606 0.585 0.565 0.545 0.527 0.509 0.491 0.474 0.458 0.442 0.427 0.412 0.398 0.384 0.371 0.358 0.346 0.334 0.322 0.311 0.3 0.29 0.28 0.27 0.261 0.252 0.243 0.235 0.227 0.219 0.211 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.965" PeakHeight="110.0" Num="3" Error="0.0">
-26.346 7.833 -1.177
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.965" EndFrequency="5.25" PeakHeight="277.183" Num="5" zHalfNm="219.851" Error="3.005">
-123.911 17.266 -10.212 3.827 -0.801
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="53.352" Depth="0.227"/>
<TopsideChapman PeakHeight="277.183" PeakDensity="341966.5" PeakScaleHeight="44.437" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
