<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-17 -048 22:00:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, 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" >
2026.02.17 (048) 22:00:00</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">
FF202604802172200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.535" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.547" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="410.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="410.000" 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="0.950" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.155" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.403" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="439.950" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="377.009" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.910" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="93.941" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="18.504" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.307" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="103.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="97">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
410.000 410.000 415.000 425.000 425.000 427.857 430.714 433.571 436.429 439.286 442.143 445.000 450.000 455.000 448.333 441.667 435.000 435.000 435.000 432.500 430.000 427.500 425.000 422.500 420.000 417.500 415.000 415.000 415.000 415.000 415.000 425.000 420.000 420.000 420.625 421.250 421.875 422.500 423.125 423.750 424.375 425.000 427.500 430.000 430.000 430.000 430.000 430.000 430.000 431.333 432.667 434.000 435.333 436.667 438.000 439.333 440.667 442.000 443.333 444.667 446.000 447.333 448.667 450.000 460.000 455.000 460.000 465.000 470.000 485.000 475.000 480.000 485.000 490.000 490.000 490.000 490.000 492.500 495.000 490.000 490.000 505.000 510.000 515.000 517.500 520.000 520.000 525.000 525.586 526.333 527.321 528.688 530.700 533.962 540.155 556.462 717.882
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 69 57 63 57 0 0 0 0 54 0 63 60 0 0 54 63 63 60 0 0 0 0 0 0 0 66 0 72 69 72 69 66 63 0 0 0 0 75 51 0 72 0 72 66 78 78 0 72 69 72 69 78 81 81 84 81 75 78 0 66 0 0 69 72 72 0 0 0 63 66 0 0 66 72 69 75 0 66 75 72 69 75 69 72 78 78 66 0 75 69 75 66 66 0 69 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 0.390625 1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -0.390625 2.734375 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -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 -1.953125 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -0.390625 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.628 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.275 140.0 145.0 150.0 155.0 160.0 165.0 168.55 170.0 175.0 180.0 185.0 190.0 195.0 197.825 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 439.95 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.266 0.349 0.39 0.403 0.399 0.385 0.361 0.324 0.27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.245 0.279 0.314 0.349 0.383 0.403 0.421 0.468 0.525 0.592 0.671 0.759 0.856 0.96 1.07 1.185 1.304 1.428 1.556 1.688 1.823 1.964 2.108 2.257 2.41 2.569 2.732 2.901 3.075 3.255 3.441 3.633 3.831 4.035 4.247 4.464 4.689 4.92 5.158 5.402 5.651 5.907 6.166 6.429 6.693 6.955 7.214 7.465 7.703 7.923 8.116 8.278 8.399 8.475 8.5 8.5 8.491 8.464 8.422 8.364 8.293 8.21 8.116 8.012 7.899 7.778 7.651 7.517 7.379 7.237 7.091 6.942 6.792 6.64 6.487 6.333 6.18 6.027 5.875 5.724 5.574 5.426 5.28 5.136 4.994 4.855 4.718 4.584 4.452 4.323 4.196 4.073 3.952 3.834 3.72 3.607 3.498 3.392 3.288 3.187 3.089 2.994 2.901 2.811 2.723 2.638 2.555 2.475 2.397 2.321 2.248 2.177 2.108 2.041 1.976 1.913 1.852 1.793 1.735 1.68 1.626 1.574 1.523 1.474 1.427 1.381 1.337 1.294 1.252 1.211 1.172 1.135 1.098 1.062 1.028 0.995 0.963 0.932 0.901 0.872 0.844 0.817 0.79 0.765 0.74 0.716 0.693 0.67 0.649 0.628 0.607 0.587 0.568 0.55 0.532 0.515 0.498 0.482 0.466 0.451 0.437 0.422 0.409 0.395 0.383 0.37 0.358 0.347

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.403" PeakHeight="110.0" Num="3" Error="0.0">
-20.295 3.146 -0.223
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.403" EndFrequency="8.5" PeakHeight="439.95" Num="5" zHalfNm="377.009" Error="5.119">
-218.42 -37.626 19.451 -4.452 -1.078
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.825" Depth="0.203"/>
<TopsideChapman PeakHeight="439.95" PeakDensity="896402.0" PeakScaleHeight="47.307" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
