<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 10:40:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.02.16 (047) 10:40:00</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">
FF202604702161040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="31" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.947" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.144" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.700" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.500" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.660" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="105.084" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.251" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.092" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="380.000" 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="2.482" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="300.002" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="221.481" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.803" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.700" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="107.035" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.185" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.514" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="119.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 240.000 240.000 240.000 240.000 240.000 243.333 246.667 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 261.667 263.333 265.000 266.667 268.333 270.000 270.000 270.000 270.000 270.000 272.000 274.000 276.000 278.000 280.000 280.000 285.000 282.500 280.000 280.000 280.000 285.000 287.500 290.000 290.000 290.000 290.000 290.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 302.500 305.000 305.000 310.000 310.000 312.500 315.000 315.000 315.000 315.000 320.000 320.000 320.000 322.500 325.000 325.000 330.000 330.000 330.000 330.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 390.000 395.000 395.000 400.000 403.405 407.416 412.210 418.040 425.285 434.530 446.735 463.593 488.393 528.474
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 48 0 48 48 57 0 0 51 0 66 0 54 60 0 60 51 45 60 0 0 48 48 0 0 0 48 0 66 60 63 63 66 0 0 0 0 63 0 57 0 72 0 66 75 60 63 0 66 69 69 60 66 48 0 0 51 0 66 69 63 69 69 60 66 0 57 60 66 66 57 69 69 0 60 66 60 63 69 69 63 54 60 63 60 57 54 60 54 0 45 57 51 54 48 57 57 57 60 57 51 51 54 48 45 57 54 57 60 63 60 57 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 1.953125 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 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 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 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 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 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 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.084 106.789 109.116 112.931
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 66
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 -0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 3.45 3.5 3.55 3.6 3.65 3.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 115.000 115.000 115.000 115.000 115.000 114.000 113.000 112.000 111.000 110.000 110.000 115.000 115.000 114.000 113.000 112.000 111.000 110.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 63 0 0 54 63 0 0 0 0 69 69 69 63 0 45 0 0 0 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
</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" >
90.0 95.0 98.251 100.0 103.925 105.0 109.598 110.0 115.0 115.272 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 300.002 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.433 2.66 2.647 2.526 2.526 2.526 2.535 2.654 2.66 2.819 2.973 3.122 3.269 3.416 3.567 3.721 3.88 4.045 4.217 4.397 4.585 4.782 4.989 5.205 5.43 5.665 5.908 6.159 6.415 6.675 6.937 7.199 7.459 7.713 7.961 8.199 8.426 8.639 8.836 9.014 9.17 9.303 9.409 9.487 9.534 9.55 9.55 9.544 9.525 9.494 9.452 9.4 9.338 9.268 9.189 9.103 9.009 8.91 8.804 8.694 8.579 8.459 8.337 8.211 8.082 7.951 7.819 7.685 7.549 7.413 7.276 7.14 7.003 6.866 6.729 6.594 6.459 6.325 6.192 6.06 5.93 5.801 5.674 5.548 5.424 5.302 5.182 5.063 4.947 4.832 4.72 4.609 4.5 4.394 4.289 4.187 4.086 3.988 3.891 3.797 3.704 3.614 3.525 3.438 3.354 3.271 3.19 3.11 3.033 2.957 2.883 2.811 2.74 2.672 2.604 2.539 2.475 2.412 2.351 2.291 2.233 2.177 2.121 2.067 2.015 1.963 1.913 1.864 1.817 1.77 1.725 1.681 1.638 1.596 1.555 1.515 1.476 1.438 1.401 1.365 1.33 1.296 1.262 1.23 1.198 1.167 1.137 1.108 1.079 1.051 1.024 0.998 0.972 0.947 0.923 0.899 0.875 0.853 0.831 0.809 0.788 0.768 0.748 0.729 0.71 0.692 0.674 0.656 0.639 0.623 0.607 0.591 0.576 0.561 0.546 0.532 0.518 0.505 0.492 0.479 0.467 0.455 0.443 0.431 0.42 0.409 0.399

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.66" PeakHeight="98.251" Num="3" Error="1.738">
-12.09 4.956 -1.117
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.66" EndFrequency="9.55" PeakHeight="300.002" Num="5" zHalfNm="221.481" Error="2.267">
-162.306 -23.948 -0.297 0.736 1.085
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.021" Depth="0.134"/>
<TopsideChapman PeakHeight="300.002" PeakDensity="1131544.6" PeakScaleHeight="59.514" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
