<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 17:20:00.000"
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 11 0 0 0 0 0 0 0 0 1 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" >
2026.02.15 (046) 17:20:00</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">
FF202604602151720009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.479" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.991" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.350" 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="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="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" 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="3.213" 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="/" />
<Modeled Name="foF1p" Val="4.277" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="391.135" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="283.268" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.244" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="146.040" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="64.387" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="81.348" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="177.440" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="148">
<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 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 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 274.286 278.571 282.857 287.143 291.429 295.714 300.000 300.000 305.000 305.000 307.500 310.000 312.500 315.000 315.000 316.667 318.333 320.000 325.000 325.000 325.000 326.667 328.333 330.000 331.667 333.333 335.000 336.667 338.333 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 381.667 383.333 385.000 390.000 395.000 395.000 395.000 395.000 400.000 402.500 405.000 405.000 405.000 407.500 410.000 410.000 410.000 415.000 417.500 420.000 420.000 422.500 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 452.500 455.000 457.500 460.000 460.000 460.000 465.000 465.000 470.000 472.500 475.000 475.000 480.000 482.500 485.000 485.000 490.000 490.000 495.000 498.889 502.778 506.667 510.556 514.444 518.333 522.222 526.111 530.000 535.000 542.500 550.000 555.000 565.000 574.860 586.260 599.590 615.387 634.405 657.742 687.056
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 45 0 0 0 0 48 48 54 51 0 48 0 51 48 0 0 51 54 57 57 0 54 0 0 0 0 48 0 54 51 57 57 51 51 57 57 54 45 60 54 57 57 57 51 57 60 57 57 60 60 57 63 63 60 60 63 57 57 60 0 0 57 66 60 63 63 63 63 0 54 60 66 57 63 66 63 63 0 51 57 0 54 60 60 63 57 0 60 63 60 60 63 63 60 57 0 60 60 63 60 60 57 60 60 57 0 57 0 54 0 57 54 54 48 0 48 51 48 0 45 51 48 48 48 0 0 0 0 0 0 45 0 42 45 0 48 42 48 48 48 45 45 42 0 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 1.953125 -1.953125 0.390625 -0.390625 2.734375 -1.171875 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 1.953125 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 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 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 -0.390625 -0.390625 0.390625 -1.953125 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -1.171875 -1.171875 0.390625 -0.390625 0.390625 -2.734375 0.390625 1.171875 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 1.953125 -0.390625 1.953125 -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" >
89.51 90.0 95.0 100.0 105.0 110.0 112.289 114.578 115.0 116.867 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 391.135 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.161 2.781 3.108 3.213 3.091 3.091 3.113 3.213 3.305 3.446 3.581 3.714 3.845 3.975 4.106 4.237 4.369 4.502 4.638 4.775 4.915 5.057 5.202 5.35 5.501 5.655 5.813 5.974 6.139 6.308 6.48 6.656 6.837 7.021 7.21 7.402 7.598 7.798 8.001 8.208 8.417 8.63 8.845 9.061 9.279 9.498 9.716 9.934 10.15 10.362 10.57 10.773 10.968 11.154 11.329 11.491 11.639 11.769 11.88 11.97 12.038 12.081 12.099 12.1 12.097 12.086 12.067 12.04 12.005 11.962 11.913 11.858 11.796 11.728 11.655 11.577 11.493 11.405 11.313 11.217 11.118 11.015 10.908 10.799 10.688 10.574 10.458 10.34 10.22 10.099 9.976 9.852 9.728 9.603 9.477 9.35 9.223 9.096 8.969 8.843 8.716 8.589 8.463 8.338 8.212 8.088 7.964 7.841 7.719 7.598 7.477 7.358 7.24 7.123 7.007 6.892 6.778 6.666 6.555 6.445 6.336 6.229 6.123 6.018 5.915 5.813 5.712 5.613 5.515 5.419 5.324 5.23 5.138 5.047 4.957 4.869 4.782 4.696 4.612 4.529 4.448 4.367 4.288 4.211 4.134 4.059 3.985 3.912 3.841 3.77 3.701 3.633 3.566 3.501 3.436 3.373 3.31 3.249 3.189 3.13 3.072 3.015 2.959 2.904 2.85 2.796 2.744 2.693 2.643 2.593 2.545 2.497 2.45 2.405 2.359 2.315 2.272 2.229 2.187 2.146 2.106 2.066 2.027 1.989 1.952 1.915

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.213" PeakHeight="110.0" Num="3" Error="0.0">
-30.368 12.955 -3.077
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.213" EndFrequency="12.1" PeakHeight="391.135" Num="5" zHalfNm="283.268" Error="3.201">
-232.636 -49.719 5.985 1.446 0.656
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.867" Depth="0.122"/>
<TopsideChapman PeakHeight="391.135" PeakDensity="1816501.2" PeakScaleHeight="81.348" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
