<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-19 -050 22:40:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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) 22:40:00</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">
FF202605002192240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.637" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.208" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.150" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="454.623" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="402.735" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.616" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="79.777" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.757" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.724" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="94.580" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 385.000 385.000 385.000 390.000 390.000 392.500 395.000 395.000 400.000 400.000 400.000 400.000 400.000 400.000 402.500 405.000 410.000 413.571 417.143 420.714 424.286 427.857 431.429 435.000 450.000 435.000 450.000 450.000 451.667 453.333 455.000 459.545 464.091 468.636 473.182 477.727 482.273 486.818 491.364 495.909 500.455 505.000 500.000 501.667 503.333 505.000 505.385 505.769 506.154 506.538 506.923 507.308 507.692 508.077 508.462 508.846 509.231 509.615 510.000 505.000 500.000 495.000 500.000 490.000 488.333 486.667 485.000 480.000 477.500 475.000 470.000 470.000 465.000 465.000 465.000 460.000 460.000 460.000 460.000 460.000 460.000 461.000 462.000 463.000 464.000 465.000 465.000 465.000 470.000 471.875 473.750 475.625 477.500 479.375 481.250 483.125 485.000 475.000 475.000 475.000 485.000 495.000 515.000 524.388 535.644 549.388 566.546 588.573 617.881
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 72 72 69 72 75 0 66 69 57 0 0 63 0 63 57 66 69 63 66 66 66 69 69 69 54 63 57 57 0 51 54 0 0 0 0 0 0 0 48 0 0 54 48 0 0 51 0 0 0 0 0 0 0 60 0 0 0 48 54 0 0 57 51 54 51 63 51 57 0 63 60 63 66 66 60 63 69 0 0 69 63 0 0 0 0 66 0 60 60 63 57 0 57 51 0 51 48 54 51 48 51 51 54 0 48 0 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 -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 1.953125 0.390625 0.390625 0.390625 -1.171875 1.171875 -0.390625 2.734375 -1.171875 1.953125 -1.171875 -1.953125 1.171875 -1.953125 -2.734375 2.734375 -2.734375 -1.953125 0.390625 -0.390625 -1.953125 -2.734375 -1.171875 -0.390625 -2.734375 0.390625 1.953125 0.390625 0.390625 0.390625 -0.390625 -1.953125 -1.171875 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -1.953125 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 1.953125 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 0.390625 -0.390625 -2.734375 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -2.734375 1.953125 2.734375 -1.953125 -1.171875 -0.390625 -0.390625 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="184">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.529 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.059 180.0 185.0 190.0 195.0 200.0 205.0 207.588 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 454.623 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.274 0.229 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.223 0.247 0.271 0.294 0.318 0.342 0.354 0.378 0.435 0.504 0.583 0.671 0.765 0.865 0.968 1.075 1.185 1.298 1.414 1.532 1.653 1.777 1.904 2.034 2.167 2.304 2.444 2.588 2.736 2.888 3.045 3.206 3.371 3.542 3.718 3.899 4.086 4.279 4.478 4.684 4.897 5.118 5.346 5.582 5.827 6.08 6.343 6.614 6.895 7.183 7.478 7.776 8.07 8.346 8.583 8.746 8.8 8.8 8.784 8.742 8.676 8.589 8.482 8.359 8.222 8.071 7.91 7.741 7.563 7.38 7.193 7.002 6.81 6.616 6.422 6.229 6.036 5.846 5.658 5.473 5.291 5.112 4.938 4.767 4.6 4.437 4.279 4.125 3.975 3.83 3.69 3.553 3.421 3.293 3.17 3.05 2.935 2.824 2.716 2.612 2.512 2.416 2.323 2.233 2.147 2.064 1.984 1.907 1.833 1.761 1.693 1.627 1.563 1.502 1.443 1.387 1.332 1.28 1.23 1.181 1.135 1.09 1.047 1.006 0.967 0.929 0.892 0.857 0.823 0.791 0.759 0.729 0.701 0.673 0.646 0.621 0.596 0.573 0.55 0.529 0.508 0.488 0.468 0.45 0.432 0.415 0.399 0.383 0.368 0.353 0.339 0.326 0.313 0.301 0.289 0.277 0.266 0.256 0.246 0.236 0.227 0.218 0.209 0.201

</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="8.8" PeakHeight="454.623" Num="5" zHalfNm="402.735" Error="6.539">
-211.66 -62.467 35.859 -8.668 -0.099
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.588" Depth="0.154"/>
<TopsideChapman PeakHeight="454.623" PeakDensity="960794.06" PeakScaleHeight="38.724" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
