<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-15 -046 19:20:00.000"
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: 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" >
2026.02.15 (046) 19:20:00</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">
FF202604602151920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.688" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.101" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="0.700" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="482.221" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.651" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="349.172" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="271.294" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.579" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="103.264" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.890" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="55.640" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="136.770" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.110" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="154">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
215.000 220.000 225.000 225.000 225.000 230.000 232.500 235.000 237.500 240.000 242.500 245.000 247.500 250.000 252.500 255.000 257.500 260.000 262.500 265.000 270.000 272.500 275.000 280.000 282.500 285.000 285.000 290.000 290.000 291.000 292.000 293.000 294.000 295.000 298.333 301.667 305.000 305.000 305.000 310.000 310.000 310.000 311.667 313.333 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 352.500 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 427.500 430.000 430.000 430.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 455.000 457.500 460.000 460.000 460.000 465.000 470.000 470.000 471.410 473.005 474.824 476.917 479.352 482.221 485.649 489.819 495.000 501.611 510.339 522.395
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 54 54 51 57 0 54 0 0 0 0 0 54 0 0 0 60 0 60 57 51 60 54 0 51 60 51 57 0 0 63 0 57 0 0 60 66 69 66 66 69 0 0 69 72 72 72 78 78 78 72 45 69 69 0 66 72 0 69 66 72 72 69 66 75 72 69 72 72 69 72 72 0 72 75 72 72 75 72 72 75 75 72 72 66 72 0 72 48 57 66 66 63 66 72 63 66 57 63 69 66 66 66 69 69 69 69 66 69 66 0 69 69 0 63 66 63 0 63 66 63 0 54 63 63 60 60 60 57 57 0 54 54 48 0 45 51 54 51 42 48 54 0 54 51 0 51 0 48 45 45 0 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 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 -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 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 -2.734375 -0.390625 -0.390625 0.390625 -0.390625 1.953125 -0.390625 0.390625 1.953125 -0.390625 0.390625 1.171875 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -2.734375 2.734375
</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" >
89.61 90.0 95.0 100.0 105.0 110.0 114.842 115.0 119.683 120.0 124.525 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.172 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.781 2.295 2.565 2.651 2.528 2.528 2.528 2.536 2.651 2.663 2.79 2.919 3.051 3.188 3.328 3.473 3.623 3.778 3.938 4.103 4.273 4.448 4.627 4.811 4.998 5.189 5.383 5.58 5.779 5.981 6.184 6.389 6.595 6.803 7.013 7.223 7.435 7.649 7.864 8.08 8.298 8.519 8.741 8.965 9.192 9.422 9.654 9.889 10.125 10.362 10.596 10.82 11.018 11.158 11.2 11.2 11.188 11.16 11.117 11.059 10.988 10.904 10.809 10.703 10.588 10.464 10.332 10.194 10.049 9.899 9.744 9.586 9.423 9.258 9.091 8.922 8.752 8.58 8.409 8.237 8.065 7.894 7.724 7.555 7.387 7.221 7.056 6.893 6.732 6.574 6.417 6.263 6.112 5.963 5.816 5.672 5.531 5.392 5.256 5.123 4.993 4.865 4.74 4.618 4.498 4.381 4.267 4.155 4.046 3.939 3.835 3.733 3.634 3.538 3.443 3.351 3.261 3.174 3.088 3.005 2.924 2.845 2.768 2.693 2.62 2.549 2.48 2.412 2.347 2.283 2.221 2.16 2.101 2.043 1.988 1.933 1.88 1.829 1.778 1.73 1.682 1.636 1.591 1.547 1.505 1.463 1.423 1.384 1.346 1.309 1.273 1.238 1.203 1.17 1.138 1.107 1.076 1.046 1.017 0.989 0.962 0.935 0.91 0.884 0.86 0.836 0.813 0.791 0.769 0.748 0.727 0.707 0.687 0.668 0.65 0.632 0.614 0.597 0.581 0.565 0.549 0.534 0.519 0.505 0.491 0.477

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.651" PeakHeight="110.0" Num="3" Error="0.0">
-29.872 12.236 -2.754
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.651" EndFrequency="11.2" PeakHeight="349.172" Num="5" zHalfNm="271.294" Error="3.374">
-175.088 -65.003 20.878 -6.955 1.521
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.525" Depth="0.123"/>
<TopsideChapman PeakHeight="349.172" PeakDensity="1556327.5" PeakScaleHeight="55.64" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
