<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-19 -050 22:20:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Multiple candidates for F2x 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" >
2026.02.19 (050) 22:20:00</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">
FF202605002192220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="23" >
<URSI ID="00" Val="10.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.327" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.016" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="611.760" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="505.661" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="429.067" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.772" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="115.913" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.466" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.290" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="126.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="157">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 375.000 385.000 385.000 383.333 381.667 380.000 390.000 380.000 390.000 392.500 395.000 395.000 400.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 405.000 400.000 405.000 395.000 385.000 410.000 410.000 410.000 410.000 410.000 410.000 405.000 400.000 400.000 405.000 410.000 412.500 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 436.667 438.333 440.000 442.500 445.000 450.000 452.500 455.000 455.000 455.000 457.500 460.000 461.667 463.333 465.000 475.000 475.357 475.714 476.071 476.429 476.786 477.143 477.500 477.857 478.214 478.571 478.929 479.286 479.643 480.000 480.000 480.000 480.000 483.333 486.667 490.000 493.333 496.667 500.000 503.333 506.667 510.000 513.333 516.667 520.000 523.333 526.667 530.000 533.333 536.667 540.000 545.000 550.000 555.000 545.000 547.500 550.000 552.500 555.000 565.000 575.000 575.000 575.000 575.000 578.333 581.667 585.000 600.000 595.000 595.000 600.000 605.000 610.000 615.000 615.000 616.250 617.500 618.750 620.000 620.000 620.000 618.750 617.500 616.250 615.000 620.000 625.000 630.000 630.000 630.000 630.000 636.667 643.333 650.000 645.000 645.000 633.333 621.667 610.000 611.760 614.607 620.000 634.120 767.869
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 66 54 57 0 0 66 57 69 66 0 57 60 51 63 66 51 57 57 51 0 57 57 60 0 57 66 0 60 66 63 63 0 63 0 0 66 57 63 60 63 63 57 63 66 66 0 60 63 0 66 0 51 0 60 0 48 60 60 66 63 63 0 69 0 0 60 51 0 51 57 0 0 0 0 66 66 63 0 63 60 63 0 66 63 0 0 0 69 60 66 0 69 0 0 51 57 48 0 0 63 0 63 66 60 60 60 48 63 60 54 63 63 63 60 60 57 57 63 51 57 63 60 60 63 51 57 0 0 0 54 54 57 0 0 0 51 0 57 51 45 48 54 0 0 45 48 45 0 0 0 0 48 48 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 -1.953125 -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 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 1.953125 -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 1.953125 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 -0.390625 -1.171875 -1.171875 -1.171875 -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 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -2.734375 -0.390625 0.390625 -0.390625 0.390625 1.953125 1.953125 2.734375 -1.171875 -1.953125 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -0.390625 -0.390625 -2.734375 -2.734375 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.207 145.0 150.0 155.0 160.0 165.0 170.0 172.415 175.0 180.0 185.0 190.0 195.0 200.0 203.622 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 505.661 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.301 0.266 0.215 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.237 0.262 0.287 0.311 0.336 0.354 0.379 0.447 0.507 0.565 0.625 0.689 0.757 0.829 0.908 0.994 1.086 1.187 1.297 1.415 1.541 1.677 1.82 1.971 2.129 2.293 2.463 2.637 2.816 2.998 3.183 3.371 3.562 3.756 3.952 4.15 4.35 4.553 4.758 4.965 5.174 5.386 5.6 5.817 6.036 6.258 6.482 6.709 6.939 7.172 7.408 7.646 7.887 8.131 8.376 8.624 8.873 9.121 9.369 9.613 9.85 10.076 10.284 10.467 10.612 10.71 10.749 10.75 10.744 10.722 10.686 10.635 10.572 10.496 10.41 10.314 10.208 10.093 9.972 9.843 9.708 9.568 9.423 9.274 9.122 8.967 8.809 8.649 8.488 8.326 8.163 8.0 7.837 7.675 7.513 7.352 7.192 7.033 6.876 6.72 6.566 6.414 6.264 6.117 5.971 5.828 5.687 5.549 5.413 5.279 5.148 5.02 4.894 4.771 4.65 4.532 4.416 4.303 4.192 4.084 3.978 3.875 3.774 3.675 3.579 3.485 3.393 3.304 3.217 3.131 3.048 2.967 2.888 2.811 2.736 2.663 2.592 2.522 2.455 2.389 2.324 2.262 2.201 2.142 2.084 2.028 1.973 1.919 1.867 1.817 1.768 1.72 1.673 1.628 1.583 1.54 1.499 1.458 1.418 1.38 1.342 1.306 1.27 1.235 1.202 1.169 1.137

</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="10.75" PeakHeight="505.661" Num="5" zHalfNm="429.067" Error="9.761">
-277.603 -49.461 34.893 -16.425 6.557
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.622" Depth="0.154"/>
<TopsideChapman PeakHeight="505.661" PeakDensity="1433777.9" PeakScaleHeight="56.29" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
