<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-17 -048 11:20:00.000"
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="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" >
2026.02.17 (048) 11:20:00</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">
FF202604802171120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="31" >
<URSI ID="00" Val="9.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.769" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.277" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.300" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.550" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.860" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="111.328" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="126.667" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="102.485" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="12.222" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" 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="2.771" 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="322.446" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.814" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.083" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.900" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="125.531" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.849" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.973" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="140.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.710" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="130">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 9.6 9.65 9.7 9.75 9.8 9.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 220.000 220.000 215.000 215.000 215.000 216.250 217.500 218.750 220.000 221.667 223.333 225.000 230.000 230.000 230.000 230.000 235.000 240.000 240.000 242.000 244.000 246.000 248.000 250.000 250.000 253.333 256.667 260.000 265.000 265.833 266.667 267.500 268.333 269.167 270.000 270.000 270.000 270.000 270.000 271.667 273.333 275.000 280.000 280.000 281.364 282.727 284.091 285.455 286.818 288.182 289.545 290.909 292.273 293.636 295.000 295.000 297.500 300.000 302.500 305.000 305.000 305.000 305.000 305.000 310.000 312.000 314.000 316.000 318.000 320.000 315.000 318.333 321.667 325.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 445.000 445.000 450.000 460.000 465.000 475.000 485.000 495.000 510.000 537.500 580.391
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 57 48 48 51 0 0 0 48 0 0 51 51 57 63 54 60 57 54 0 0 51 0 57 54 0 0 60 51 0 60 0 0 0 0 0 57 57 63 0 0 51 60 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 57 60 66 63 57 0 48 0 0 51 63 0 0 57 63 51 57 66 57 63 66 60 63 63 60 66 60 60 57 63 63 63 60 63 60 66 63 69 66 57 63 57 63 63 66 66 57 66 63 54 57 51 60 63 60 66 63 60 57 57 60 60 63 63 60 57 48 0 42
</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 -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 -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 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 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.55 2.6 2.65 2.7 2.75 2.8 2.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
111.328 112.179 113.146 114.269 115.614 117.305 119.614
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 0 0 0 0 48
</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 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="9">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
119.000 120.500 122.000 123.500 125.000 125.000 110.000 130.000 135.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 51 0 51 54 45 48 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 -0.390625 0.390625 1.953125 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 95.0 100.0 102.485 105.0 106.752 110.0 111.019 115.0 115.286 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 322.446 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.267 2.799 2.86 2.817 2.734 2.734 2.734 2.852 2.86 2.97 3.09 3.214 3.342 3.476 3.616 3.763 3.917 4.08 4.252 4.432 4.621 4.818 5.023 5.235 5.452 5.674 5.898 6.123 6.349 6.573 6.796 7.017 7.235 7.449 7.66 7.867 8.069 8.267 8.459 8.646 8.825 8.997 9.16 9.312 9.451 9.574 9.679 9.761 9.817 9.846 9.85 9.849 9.839 9.819 9.791 9.754 9.71 9.657 9.598 9.532 9.46 9.382 9.299 9.211 9.119 9.022 8.922 8.818 8.711 8.602 8.49 8.376 8.261 8.143 8.025 7.905 7.785 7.664 7.542 7.42 7.298 7.176 7.055 6.933 6.813 6.692 6.573 6.454 6.336 6.22 6.104 5.989 5.876 5.764 5.653 5.543 5.435 5.328 5.223 5.119 5.017 4.916 4.817 4.719 4.623 4.528 4.435 4.343 4.253 4.165 4.078 3.993 3.909 3.826 3.746 3.666 3.588 3.512 3.437 3.364 3.292 3.221 3.152 3.084 3.017 2.952 2.888 2.825 2.764 2.704 2.645 2.587 2.531 2.475 2.421 2.368 2.316 2.265 2.216 2.167 2.119 2.073 2.027 1.982 1.938 1.896 1.854 1.813 1.773 1.733 1.695 1.657 1.621 1.585 1.55 1.515 1.482 1.449 1.416 1.385 1.354 1.324 1.295 1.266 1.238 1.21 1.183 1.157 1.131 1.106 1.081 1.057 1.033 1.01 0.988 0.966 0.944 0.923 0.902 0.882 0.863 0.843 0.824 0.806 0.788 0.77 0.753

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.86" PeakHeight="102.485" Num="3" Error="4.231">
-18.378 7.654 -1.761
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.86" EndFrequency="9.85" PeakHeight="322.446" Num="5" zHalfNm="228.814" Error="2.708">
-181.505 -27.59 4.817 -4.279 1.397
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.801" Depth="0.126"/>
<TopsideChapman PeakHeight="322.446" PeakDensity="1203753.1" PeakScaleHeight="68.973" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
