<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 23:40:00.000"
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 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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) 23:40:00</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">
FF202604702162340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.797" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.325" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="461.106" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="383.513" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="338.829" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.064" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="66.925" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="22.425" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="33.160" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="70.900" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.590" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="173">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 311.667 313.333 315.000 317.500 320.000 310.000 310.714 311.429 312.143 312.857 313.571 314.286 315.000 315.000 315.000 315.000 315.000 315.000 315.000 316.667 318.333 320.000 320.000 320.000 320.000 322.500 325.000 330.000 330.000 330.000 337.500 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 352.500 355.000 355.000 355.000 355.000 353.333 351.667 350.000 350.000 350.000 350.000 350.000 350.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 372.500 370.000 375.000 372.500 370.000 372.500 375.000 375.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 423.333 426.667 430.000 430.000 430.000 435.000 440.000 440.000 440.000 442.500 445.000 450.000 445.000 447.500 450.000 450.000 450.573 451.251 452.066 453.063 454.313 455.923 458.077 461.106 465.680 473.385 489.108
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 72 72 72 72 75 66 66 66 0 0 0 72 0 0 75 0 0 66 0 51 0 0 0 0 0 0 0 63 63 63 0 0 0 0 0 0 60 60 63 63 0 57 66 0 51 0 51 60 0 0 69 66 69 57 63 66 0 57 0 63 63 0 0 60 0 63 75 0 0 66 0 69 69 72 72 69 66 75 78 75 0 78 75 0 69 0 75 0 78 75 72 75 69 0 72 75 72 72 72 75 69 72 66 78 78 69 57 0 60 0 0 63 81 78 78 78 81 81 78 75 78 78 75 75 78 78 69 72 72 60 66 69 78 66 72 75 78 72 66 69 69 72 66 63 69 0 0 69 57 66 57 63 69 69 0 66 60 63 51 54 45 54 54 0 54 48 0 0 0 45 54 54
</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 1.171875 -1.953125 1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -0.390625 -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 -0.390625 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 1.171875 1.171875 1.171875 1.171875 1.171875 -1.171875 -1.171875 1.171875 -1.953125 1.171875 1.171875 1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -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 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.953125 1.171875 1.171875 1.953125 1.171875 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -2.734375 1.171875 1.171875 -0.390625 2.734375 -2.734375 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="159">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.953 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.907 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.86 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 383.513 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.286 0.25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.244 0.266 0.289 0.311 0.333 0.354 0.358 0.48 0.59 0.707 0.838 0.986 1.155 1.348 1.565 1.809 2.077 2.369 2.682 3.014 3.363 3.728 4.107 4.499 4.903 5.319 5.746 6.184 6.633 7.091 7.557 8.031 8.509 8.987 9.458 9.914 10.337 10.707 10.993 11.164 11.2 11.198 11.16 11.078 10.958 10.804 10.621 10.412 10.183 9.936 9.676 9.405 9.126 8.842 8.555 8.267 7.979 7.693 7.411 7.132 6.859 6.591 6.329 6.075 5.827 5.587 5.354 5.129 4.911 4.701 4.499 4.304 4.116 3.936 3.763 3.597 3.437 3.285 3.138 2.998 2.863 2.734 2.611 2.493 2.38 2.273 2.17 2.071 1.977 1.887 1.801 1.719 1.64 1.565 1.494 1.425 1.36 1.298 1.238 1.182 1.127 1.076 1.026 0.979 0.934 0.891 0.85 0.811 0.774 0.739 0.705 0.672 0.641 0.612 0.584 0.557 0.531 0.507 0.484 0.461 0.44 0.42 0.4 0.382 0.364 0.348 0.332 0.316 0.302 0.288 0.275 0.262 0.25 0.239 0.228 0.217 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="11.2" PeakHeight="383.513" Num="5" zHalfNm="338.829" Error="3.123">
-158.067 -21.53 14.232 -5.789 2.501
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.86" Depth="0.154"/>
<TopsideChapman PeakHeight="383.513" PeakDensity="1556327.5" PeakScaleHeight="33.16" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
