<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-22 -053 21:30:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.02.22 (053) 21:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605302222130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.438" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.964" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="555.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.783" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="429.231" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="356.306" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.088" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.328" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.688" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="52.973" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="117.040" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="159">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.000 310.000 311.250 312.500 313.750 315.000 316.667 318.333 320.000 320.000 320.000 320.000 330.000 330.000 331.250 332.500 333.750 335.000 345.000 350.000 350.000 350.000 351.000 352.000 353.000 354.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 372.500 370.000 367.500 365.000 362.500 360.000 360.000 365.000 365.000 365.000 367.500 370.000 365.000 370.000 375.000 375.000 375.000 375.000 375.000 380.000 381.364 382.727 384.091 385.455 386.818 388.182 389.545 390.909 392.273 393.636 395.000 395.000 400.000 400.000 405.000 406.667 408.333 410.000 411.667 413.333 415.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 432.500 435.000 435.000 435.000 440.000 440.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 490.000 490.000 495.000 495.000 500.000 500.000 500.000 505.000 505.000 510.000 510.000 515.000 515.000 518.333 521.667 525.000 530.000 532.143 534.286 536.429 538.571 540.714 542.857 545.000 546.667 548.333 550.000 551.667 553.333 555.000 555.000 555.000 560.000 565.000 570.000 573.494 578.463 586.092 599.300
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 60 0 0 0 0 75 0 0 69 0 72 60 66 57 0 0 0 0 66 66 63 66 0 60 0 0 54 60 0 66 60 60 63 0 54 60 63 60 54 0 60 0 0 0 0 0 0 72 75 66 66 0 0 54 60 66 0 0 0 69 66 63 0 0 0 0 0 0 0 0 0 0 72 72 66 69 57 0 48 0 0 0 60 66 69 57 66 69 57 63 69 60 66 0 60 66 69 63 69 69 69 60 66 72 66 69 63 69 60 66 57 63 66 63 66 60 63 60 51 63 69 63 69 63 66 66 66 66 63 66 63 63 0 0 57 45 0 0 0 0 0 0 48 0 0 0 57 0 54 51 0 0 51 51 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -0.390625 -1.171875 -1.171875 -1.171875 -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 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 0.390625 1.171875 2.734375 -1.953125 2.734375 -1.953125 2.734375 0.390625 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.953125 -1.953125 -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" >
90.581 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 133.342 135.0 140.0 145.0 150.0 155.0 156.685 160.0 165.0 170.0 175.0 180.0 180.027 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 429.231 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.52 0.678 0.758 0.783 0.771 0.733 0.666 0.559 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.497 0.569 0.64 0.711 0.783 0.783 0.906 1.005 1.099 1.193 1.291 1.393 1.501 1.616 1.741 1.875 2.02 2.176 2.344 2.525 2.716 2.919 3.13 3.35 3.576 3.807 4.042 4.279 4.519 4.76 5.002 5.245 5.489 5.733 5.978 6.224 6.47 6.718 6.966 7.215 7.465 7.717 7.969 8.223 8.477 8.732 8.987 9.241 9.491 9.735 9.97 10.187 10.378 10.529 10.624 10.65 10.65 10.638 10.609 10.564 10.503 10.429 10.343 10.244 10.135 10.016 9.889 9.753 9.611 9.464 9.31 9.153 8.992 8.827 8.66 8.492 8.321 8.15 7.979 7.807 7.636 7.465 7.295 7.127 6.96 6.794 6.631 6.469 6.31 6.153 5.998 5.846 5.697 5.55 5.406 5.265 5.126 4.991 4.858 4.728 4.601 4.477 4.355 4.237 4.121 4.008 3.897 3.79 3.685 3.582 3.482 3.385 3.29 3.198 3.108 3.021 2.935 2.853 2.772 2.693 2.617 2.542 2.47 2.4 2.331 2.264 2.2 2.137 2.076 2.016 1.958 1.902 1.847 1.794 1.743 1.692 1.644 1.596 1.55 1.506 1.462 1.42 1.379 1.339 1.3 1.263 1.226 1.191 1.156 1.123 1.09 1.059 1.028 0.998 0.969 0.941 0.914 0.887 0.862 0.837 0.812 0.789 0.766 0.744 0.722 0.701 0.681 0.661 0.642 0.623 0.605

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.783" PeakHeight="110.0" Num="3" Error="0.0">
-25.293 6.769 -0.895
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.783" EndFrequency="10.65" PeakHeight="429.231" Num="5" zHalfNm="356.306" Error="6.277">
-222.089 -44.561 23.743 -11.742 5.445
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="70.027" Depth="0.333"/>
<TopsideChapman PeakHeight="429.231" PeakDensity="1407227.0" PeakScaleHeight="52.973" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
