<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-27 -058 23:10:00.000"
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: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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" >
2026.02.27 (058) 23:10:00</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">
FF202605802272310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.425" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.188" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="467.277" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="388.388" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.354" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="116.049" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.225" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.138" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="117.820" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.850" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="105">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 386.250 387.500 388.750 390.000 390.000 391.667 393.333 395.000 396.667 398.333 400.000 401.667 403.333 405.000 406.667 408.333 410.000 411.667 413.333 415.000 416.667 418.333 420.000 421.667 423.333 425.000 430.000 430.000 430.000 435.000 440.000 440.000 435.000 445.000 445.000 446.111 447.222 448.333 449.444 450.556 451.667 452.778 453.889 455.000 455.000 455.000 455.000 455.000 440.000 440.000 440.000 445.000 445.000 445.000 446.667 448.333 450.000 450.000 460.000 470.000 470.000 467.500 465.000 465.000 470.000 470.000 470.000 475.000 480.000 482.500 485.000 485.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 505.000 510.000 510.000 515.000 520.000 520.000 525.000 525.000 530.000 535.000 540.000 545.000 547.500 550.000 540.000 550.000 555.000 565.000 575.000 580.000 590.000 604.440 621.817 643.129 669.883
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 0 54 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 48 63 63 60 60 0 54 54 60 51 54 0 0 0 54 0 0 0 0 54 0 54 57 0 69 66 69 57 60 66 0 0 69 69 0 69 63 0 72 69 66 72 63 72 60 0 66 72 69 72 69 69 63 66 63 72 63 69 72 69 54 54 0 60 0 51 51 0 57 51 60 63 63 60 63 66 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 0.390625 -0.390625 0.390625 0.390625 -0.390625 2.734375 -0.390625 2.734375 1.953125 1.953125 1.953125 1.171875 -0.390625 2.734375 -1.171875 1.953125 1.953125 0.390625 1.953125 -2.734375 -1.171875 0.390625 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 0.390625 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 -1.953125 -1.953125 -1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -2.734375 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 -0.390625 1.171875 1.171875 -2.734375 -0.390625 -1.953125 1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 -0.390625 1.171875 0.390625 -1.953125 -0.390625 -0.390625
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.072 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.144 180.0 185.0 190.0 195.0 200.0 205.0 210.0 212.216 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 467.277 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.33 0.31 0.282 0.243 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.231 0.254 0.276 0.299 0.321 0.344 0.354 0.383 0.439 0.501 0.57 0.645 0.728 0.819 0.918 1.025 1.14 1.264 1.396 1.536 1.684 1.84 2.005 2.177 2.356 2.543 2.737 2.938 3.145 3.359 3.579 3.805 4.036 4.273 4.515 4.761 5.01 5.264 5.519 5.777 6.036 6.295 6.553 6.809 7.061 7.309 7.549 7.781 8.002 8.211 8.404 8.58 8.736 8.87 8.979 9.063 9.119 9.147 9.15 9.148 9.135 9.111 9.075 9.029 8.973 8.909 8.836 8.755 8.668 8.574 8.475 8.37 8.26 8.147 8.03 7.909 7.786 7.661 7.533 7.405 7.274 7.143 7.012 6.88 6.748 6.616 6.484 6.353 6.223 6.093 5.965 5.838 5.712 5.587 5.464 5.343 5.223 5.105 4.988 4.874 4.761 4.65 4.541 4.434 4.329 4.226 4.125 4.026 3.928 3.833 3.74 3.649 3.559 3.472 3.386 3.302 3.22 3.14 3.062 2.985 2.91 2.837 2.766 2.696 2.628 2.562 2.497 2.434 2.372 2.311 2.253 2.195 2.139 2.084 2.031 1.979 1.928 1.879 1.831 1.783 1.738 1.693 1.649 1.607 1.565 1.525 1.486 1.447 1.41 1.373 1.338 1.303 1.269 1.237 1.205 1.173 1.143 1.113 1.084 1.056 1.029 1.002 0.976 0.951 0.926 0.902

</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="9.15" PeakHeight="467.277" Num="5" zHalfNm="388.388" Error="1.488">
-250.709 -11.119 9.523 -3.401 0.645
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="102.216" Depth="0.154"/>
<TopsideChapman PeakHeight="467.277" PeakDensity="1038740.7" PeakScaleHeight="59.138" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
