<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 13:40:00.000"
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="2 2 0 1 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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) 13:40:00</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">
FF202604702161340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="10.475" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.423" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.408" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.165" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.833" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="420.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.305" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.321" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="372.037" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="185.773" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="243.399" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.183" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="152.496" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="61.571" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.444" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="91.093" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="199.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.040" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.833 301.667 302.500 303.333 304.167 305.000 315.000 315.000 315.000 315.000 320.000 320.000 321.667 323.333 325.000 325.000 326.667 328.333 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 410.000 410.000 415.000 420.000 420.000 430.000 435.000 435.000 440.000 445.000 450.000 455.000 460.000 460.000 470.000 475.000 480.000 480.000 490.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 555.000 560.000 565.000 570.000 580.000 585.000 591.264 598.162 605.794 614.286 623.790 634.499 646.658 660.582
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 54 0 48 45 51 54 51 54 54 0 0 54 51 0 0 54 54 57 57 0 60 57 51 63 60 54 57 60 60 60 63 54 0 63 51 57 60 57 60 57 63 57 63 60 60 60 57 63 63 63 63 63 60 60 63 63 63 60 60 57 57 60 60 60 60 60 60 60 57 57 54 60 60 57 57 54 51 51 51 51 51 51 54 54 57 57 57 54 54 54 51 51 48 48 51 48 45 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 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="11">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 255.000 265.000 270.000 275.000 280.000 285.000 290.000 295.000 295.000 300.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 48 48 0 48 0 0 51 51 48
</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 -1.171875 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.496 90.0 95.0 100.0 105.0 110.0 111.9 113.801 115.0 115.701 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 185.773 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.037 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.223 2.86 3.197 3.305 3.182 3.182 3.26 3.305 3.493 3.705 3.913 4.108 4.285 4.445 4.59 4.724 4.849 4.969 5.086 5.203 5.321 5.42 5.423 5.563 5.719 5.872 6.027 6.187 6.352 6.525 6.705 6.893 7.084 7.277 7.468 7.653 7.831 8.0 8.161 8.314 8.46 8.598 8.731 8.858 8.98 9.099 9.214 9.326 9.435 9.542 9.647 9.751 9.854 9.955 10.056 10.155 10.252 10.344 10.422 10.47 10.475 10.474 10.467 10.455 10.437 10.413 10.385 10.351 10.313 10.27 10.223 10.172 10.117 10.058 9.996 9.93 9.862 9.79 9.716 9.639 9.56 9.479 9.396 9.31 9.223 9.135 9.045 8.954 8.861 8.768 8.673 8.578 8.482 8.385 8.288 8.191 8.093 7.995 7.897 7.799 7.701 7.603 7.505 7.407 7.31 7.212 7.116 7.019 6.924 6.828 6.734 6.64 6.546 6.453 6.361 6.27 6.179 6.089 6.0 5.912 5.825 5.738 5.652 5.568 5.484 5.401 5.319 5.237 5.157 5.078 5.0 4.922 4.846 4.77 4.696 4.622 4.549 4.478 4.407 4.337 4.268 4.2 4.133 4.067 4.002 3.937 3.874 3.812 3.75 3.689 3.63 3.571 3.512 3.455 3.399 3.343 3.289 3.235 3.182 3.129 3.078 3.027 2.977 2.928 2.88 2.832 2.785 2.739 2.694 2.649 2.605 2.562 2.519 2.477 2.436 2.396 2.356 2.316 2.278 2.239 2.202 2.165 2.129 2.093 2.058 2.024 1.99

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.305" PeakHeight="110.0" Num="3" Error="0.0">
-30.439 13.06 -3.125
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.305" EndFrequency="5.423" PeakHeight="185.773" Num="5" Error="0.0">
-57.097 -20.464 10.499 -3.723 0.713
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.423" EndFrequency="10.475" PeakHeight="372.037" Num="5" zHalfNm="243.399" Error="3.587">
-157.61 -42.84 22.995 -12.378 3.569
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.701" Depth="0.123"/>
<TopsideChapman PeakHeight="372.037" PeakDensity="1361360.1" PeakScaleHeight="91.093" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
