<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 09:20:00.000"
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: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.02.16 (047) 09:20:00</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">
FF202604702160920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="6.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.161" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.549" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.950" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.850" 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="100.000" 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="5.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="330.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.398" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="297.819" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="232.162" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.941" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.400" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="95.068" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.909" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.625" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="79.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.700" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.650" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="78">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.65 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 260.000 260.000 260.000 260.000 262.500 265.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 265.000 260.000 255.000 260.000 265.000 265.000 266.429 267.857 269.286 270.714 272.143 273.571 275.000 275.000 270.000 272.500 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 290.000 292.500 295.000 297.500 300.000 300.000 300.000 300.000 302.500 305.000 305.000 310.000 310.000 310.000 315.000 315.000 335.000 320.000 325.000 325.000 330.000 330.000 335.000 340.000 345.000 350.000 357.786 368.019 382.068 402.554 435.221 495.526 644.256
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 54 0 51 0 54 51 0 0 0 0 57 51 0 63 0 57 0 0 66 0 0 0 0 0 0 0 0 0 0 60 66 69 54 69 60 60 66 63 60 51 66 0 63 60 0 60 0 66 63 69 63 0 69 69 63 66 0 69 72 57 78 75 75 78 75 75 69 72 69 72 69 69 72 69 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 1.171875 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 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 1.171875 -1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 2.734375 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="12">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.000 100.000 105.000 105.000 106.667 108.333 110.000 111.667 113.333 115.000 110.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 0 57 0 0 0 0 0 51 54 51
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="184">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.984 90.0 95.0 100.0 105.0 110.0 115.0 120.0 122.043 125.0 130.0 134.086 135.0 140.0 145.0 146.129 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 297.819 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.201 0.934 1.211 1.353 1.398 1.373 1.295 1.246 1.246 1.246 1.246 1.258 1.321 1.384 1.398 1.516 1.668 1.814 1.957 2.097 2.236 2.378 2.523 2.673 2.831 2.998 3.178 3.375 3.594 3.841 4.123 4.446 4.8 5.151 5.459 5.708 5.905 6.061 6.184 6.281 6.357 6.415 6.457 6.484 6.498 6.5 6.499 6.489 6.469 6.439 6.401 6.355 6.301 6.24 6.173 6.1 6.023 5.941 5.855 5.765 5.672 5.577 5.48 5.38 5.28 5.178 5.075 4.972 4.869 4.765 4.662 4.559 4.457 4.355 4.254 4.154 4.056 3.958 3.862 3.767 3.674 3.582 3.491 3.403 3.316 3.23 3.146 3.064 2.984 2.905 2.828 2.752 2.679 2.607 2.536 2.468 2.401 2.335 2.271 2.209 2.148 2.089 2.031 1.975 1.92 1.867 1.815 1.764 1.715 1.667 1.62 1.575 1.531 1.487 1.446 1.405 1.365 1.327 1.289 1.252 1.217 1.182 1.149 1.116 1.085 1.054 1.024 0.995 0.966 0.939 0.912 0.886 0.861 0.836 0.812 0.789 0.767 0.745 0.723 0.703 0.683 0.663 0.644 0.626 0.608 0.59 0.573 0.557 0.541 0.526 0.511 0.496 0.482 0.468 0.454 0.441 0.429 0.416 0.405 0.393 0.382 0.371 0.36 0.35 0.34 0.33 0.321 0.311 0.302 0.294 0.285 0.277 0.269 0.261 0.254 0.247 0.24 0.233 0.226 0.219 0.213 0.207 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.398" PeakHeight="110.0" Num="3" Error="0.0">
-27.87 9.572 -1.718
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.398" EndFrequency="6.5" PeakHeight="297.819" Num="5" zHalfNm="232.162" Error="4.616">
-153.152 10.373 -18.09 11.79 -2.611
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="36.129" Depth="0.152"/>
<TopsideChapman PeakHeight="297.819" PeakDensity="524193.56" PeakScaleHeight="53.625" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
